What if Deku awakened a quirk similar to Marvel’s Reptil the day the sludge villain attacked Bakugo

All men are not created equal. 

This was the harsh, incontrovertible truth that Izuku Midoriya had learned at the tender age of four. It was a lesson taught not through words, but through the cold, clinical glow of an X-ray screen and the indifferent sigh of a pediatrician. While other children were spontaneously manifesting the ability to breathe fire, manipulate gravity, or transform their limbs into hardened steel, Izuku was handed a death sentence to his dreams. Two joints in his pinky toe. A marker of an evolutionary standstill. A biological receipt proving that he was left behind in the next great leap of human development.

The world had moved on, leaving him stranded in a bygone era. 

Izuku stared blankly at the scarred, wooden surface of his desk at Aldera Junior High. The rhythmic tapping of the teacher’s chalk against the blackboard faded into a dull, white noise, drowning beneath the heavy tide of Izuku’s own thoughts. He was fourteen years old now. Ten years had passed since that fateful doctor’s visit, ten years of enduring the sympathetic glances of his mother, the whispered pity of his neighbors, and the explosive, unrelenting torment of his peers. 

"Since you're all third years, it's time for you to think seriously about your futures!" the teacher announced, his voice suddenly cutting through Izuku's fog. The man held a thick stack of career aptitude forms, waving them dismissively in the air. "I'll pass out handouts for your future plans now, but... you're all pretty much planning to go into the hero course, right?"

The classroom erupted. Quirks activated simultaneously in a chaotic, illegal display of teenage exuberance. A boy with elongated, rocky fingers cheered; another manifested a small, localized raincloud over his desk; a girl with prehensile hair whipped her locks excitedly. 

"Yes, yes, you all have wonderful Quirks!" the teacher laughed, making no real effort to enforce the law against unauthorized Quirk usage in public. "But using your powers in school is against the rules!"

"Sensei! Don't lump us all in the same group!" 

The arrogant, grating voice cut through the cacophony like a serrated blade. The room instantly fell silent. Izuku flinched, his shoulders hiking up toward his ears as he shrank down in his seat. He didn't need to look to know who had spoken. 

Katsuki Bakugo leaned back in his chair, his feet propped up on his desk, an arrogant smirk plastered across his face. Small, warning pops of caramel-scented explosions crackled in the palms of his hands. "I'm not gonna be stuck at the bottom with the rest of these rejects."

Predictably, the class bristled in outrage. "That was uncalled for, Katsuki!" "Yeah, who do you think you are?!"

"You all should shut up like the extras you are!" Bakugo laughed, the miniature explosions in his hands growing slightly larger, casting an orange hue across his sharp features. 

"Oh, if I remember correctly, you want to go to U.A. High, right, Bakugo?" the teacher asked, checking his clipboard. 

A collective gasp swept through the room. U.A. High School. The pinnacle of hero education. The alma mater of the Symbol of Peace, All Might himself. It had an acceptance rate of less than point-two percent. It was a fortress of excellence, and only the absolute best of the best were even considered.

"That's exactly why you guys are just extras!" Bakugo declared, jumping onto his desk. He threw his arms wide, basking in the spotlight. "I aced the mock test! I'm the only one at this school who could possibly get into U.A. I'll definitely surpass All Might and become the top hero! My name will be inscribed on the list of top earners!"

"Oh yeah," the teacher added, peering over his reading glasses, his tone shifting to one of mild amusement. "Midoriya wanted to go to U.A., too, right?"

Time stopped. Izuku felt his heart plummet into his stomach, freezing the blood in his veins. The silence that followed was suffocating, a vacuum of anticipation that lasted for a fraction of a second before the entire classroom exploded into uproarious, mocking laughter.

"Midoriya?! No way!"

"You can't get into the hero course just by studying!"

"He's Quirkless! What's he gonna do, read the villains to death?"

"Th-They got rid of that rule!" Izuku stammered, leaping to his feet, his hands trembling as he gripped the edges of his desk. "There's just no precedent! I could be the first—!"

Before Izuku could finish his desperate defense, a blinding flash of light and a deafening CRACK shattered his desk. The concussive force threw him backward, sending him crashing onto the linoleum floor. The smell of burnt wood and scorched ozone filled his nostrils. 

Bakugo stood over him, his right hand smoking, his crimson eyes narrowed into slits of pure, unadulterated contempt. "Listen up, Deku," Bakugo snarled, using the derogatory nickname he had coined years ago—a word that meant 'useless.' "You're even worse than the rest of these damn rejects. You're completely Quirkless. How can you even stand in the same ring as me?"

Izuku scrambled backward, his palms squeaking against the polished floor, his breath coming in shallow, terrified gasps. "N-No, wait, Kacchan! It's not like I'm trying to compete with you or anything! Believe me! It's just... it's been my dream since I was little. And there's no harm in trying..."

"Try?! Try what?!" Bakugo roared, the heat from his hands radiating uncomfortably close to Izuku's face. "The entrance exam?! You're taking the exam just to 'try'?! What can you even do?!"

The words hit Izuku harder than the explosion. What could he do? Nothing. He had no enhanced strength, no elemental control, no mutant physiology. He was just Izuku. Fragile, normal, easily broken Izuku.

The rest of the school day passed in a blur of muted humiliation. Izuku moved through the halls like a ghost, keeping his head down, avoiding eye contact. When the final bell rang, he remained in his seat, slowly packing his belongings. He reached into his desk and pulled out a burnt, slightly crumpled notebook. Hero Analysis for the Future, Vol. 13. It was his life's work, a meticulous catalog of every Pro Hero, their Quirks, their weaknesses, and their combat strategies. If he couldn't have a Quirk, he would compensate with knowledge. 

Suddenly, a hand snatched the notebook from his grasp. 

Izuku blinked, looking up to see Bakugo standing there, flanked by two of his lackeys. "We're not done talking yet, Deku," Bakugo said, his voice dangerously low. 

"Kacchan, please... give it back," Izuku pleaded, reaching out tentatively. 

Bakugo didn't even look at him. He glanced at the cover. "Hero Analysis for the Future? Seriously? He's still delusional."

Bakugo clapped his hands together with the notebook trapped between his palms. A loud, sharp explosion echoed in the empty classroom. Izuku shrieked as he watched the cover of his precious notebook blacken and blister, the pages curling and smoking from the intense heat. 

"Ah...!" Izuku let out a strangled cry, his hands hovering uselessly in the air. 

Without a word, Bakugo tossed the smoldering notebook out the open third-story window. Izuku watched it fall, his heart sinking with it. 

"Most top first-string heroes have stories about them from their school days," Bakugo said, turning his back on Izuku and casually walking toward the door. "I want the shine of being able to be called the only student to make it into U.A. from this mediocre city dump. I mean, I'm a perfectionist." He paused, looking over his shoulder, his eyes cold and hollow. "So anyway, don't apply to U.A., nerd."

Izuku stood frozen, the words trapped in his throat. He couldn't speak. He couldn't fight back. He could only endure.

As Bakugo reached the doorway, he paused, a cruel, mocking smile playing on his lips. "If you wanna be a hero that badly, there's a quick way to do it. Believe that you'll be born with a Quirk in your next life... and take a swan dive off the roof of the building!"

Izuku's breath hitched. His eyes widened, staring at his childhood friend in absolute horror. Bakugo had bullied him for years, had beaten him, insulted him, and degraded him. But telling him to kill himself? That was a new, terrifying low. 

Izuku clenched his fists, taking a shaky step forward, his jaw tight. He wanted to scream. He wanted to fight. 

Bakugo turned, raising his right hand. Sparks crackled violently across his palm, lighting up his malicious grin. "What?"

Izuku froze. The fight left his body as quickly as it had come. He lowered his head, trembling, and said nothing. Bakugo scoffed, turning on his heel and leaving the classroom, his lackeys laughing as they followed.

Alone in the ruined classroom, Izuku finally allowed a single tear to escape. He wiped it away furiously. Idiot, he scolded himself. He’s an idiot. If I really jumped, he’d be charged with instigating suicide. Think before you speak, Kacchan.

But the logic did little to dull the agonizing pain in his chest. 

Ten minutes later, Izuku found himself standing by a small, artificial koi pond on the school grounds. His ruined notebook floated pathetically on the surface, being nibbled on by a few confused carp. 

"That's not fish food, stupid," Izuku muttered, his voice breaking. He reached into the murky water and pulled the soaked, burnt notebook out, clutching it to his chest. 

Mom, he thought, remembering Inko Midoriya’s tearful apologies all those years ago. That's not what I wanted you to say back then. What I wanted you to say... what I needed you to say was...

Izuku shook his head, forcing a strained, pathetic smile onto his face as he walked out of the school gates. He took a different route home today, opting for the quiet, shadowed path under a large municipal bridge. He needed the silence. He needed to rebuild the fragile walls of his optimism before he faced his mother. 

He pumped his fist in the air, mimicking his idol’s signature pose. "I'll keep trying! I can do it! I just have to work harder than anyone else! I can be a hero!"

He forced a laugh, a hollow imitation of All Might's booming guffaw, as he entered the gloomy concrete tunnel beneath the bridge. The shadows stretched long and dark across the pavement. 

A strange, gurgling sound echoed from the darkness ahead. 

Izuku stopped, his laughter dying in his throat. The sound was wet, sloshing, like a massive amount of thick mud being churned in a blender. He turned his head slowly.

Rising from a manhole cover a few feet away was a monstrous, amorphous mass of dark green, viscous sludge. Two massive, bulbous eyes floated within the liquid, connected to a jagged, gaping mouth filled with uneven, decayed teeth. The smell hit Izuku instantly—a putrid combination of raw sewage, rusted metal, and rotting meat. 

"A medium-sized invisibility cloak," the Sludge Villain gurgled, its voice wet and distorted. "Perfect."

Izuku's body locked up. Panic, cold and absolute, flooded his veins. His brain screamed at him to run, to turn around and sprint back to the street, but his legs refused to move. He was a rabbit caught in the gaze of a python. 

Before Izuku could even take a step back, the villain lunged. 

A massive wave of slime crashed over Izuku, knocking him to the ground. The impact was heavy, like being hit by a wave of wet cement. Before he could scream, the villain forced its thick, foul-tasting sludge into Izuku's open mouth and up his nose. 

"Don't worry," the villain whispered, its giant, liquid face hovering just inches from Izuku's terrified eyes. "I'm just taking over your body. It'll only hurt for about forty-five seconds. You'll feel better soon."

Izuku thrashed violently. His hands flew up, clawing desperately at the sludge covering his face. His nails scraped against something that felt like liquid rubber, finding no purchase. He couldn't breathe. The sludge was expanding inside his throat, filling his lungs, suffocating him from the inside out. 

I can't breathe! Izuku's vision began to blur, the edges darkening with black spots. My strength... it's fading.

"You can't grab me," the villain laughed, the sound vibrating through the slime directly into Izuku's ears. "I'm fluid! Thanks for the help, kid. You're my hero. I didn't think that guy had come to this city."

That guy? Izuku's mind was misfiring, starving for oxygen. I'm going to die. I'm going to die here. Someone... please...

His hands fell away from the sludge, his arms dropping weakly to his sides. The world was fading. The darkness was closing in. It was cold. So cold. 

Then, a heavy, rhythmic sound echoed through the tunnel. Footsteps. Loud, confident, ground-shaking footsteps. 

The manhole cover clattered loudly against the pavement. 

"Have no fear, you're safe!" a voice boomed. It was a voice Izuku knew better than his own. A voice he had listened to on a cracked computer monitor a thousand times. It was deep, resonant, and overflowing with absolute, unshakable power. 

Izuku forced his eyes open just a fraction. Through the murky, green filter of the sludge, he saw a massive, towering silhouette standing at the entrance of the tunnel. 

"Now that I am here!"

The Sludge Villain shrieked, instantly abandoning its mocking tone. It whipped a massive tendril of slime toward the figure. 

The man didn't flinch. He pulled his right arm back, his colossal muscles bulging beneath his white t-shirt. "TEXAS... SMASH!"

He threw a punch. He didn't even hit the villain. He punched the empty air. 

The result was cataclysmic. A shockwave of pure wind pressure erupted from the man's fist, tearing through the tunnel like an F5 tornado. The sheer force of the gale shattered the villain's fluid body, blasting the sludge apart in a thousand different directions. Izuku was thrown backward by the wind, his body tumbling across the concrete as oxygen finally rushed back into his desperate, burning lungs. 

He coughed violently, hacking up vile green slime, his chest heaving as he gasped for air. He looked up, his vision swimming, trying to focus on the impossible figure standing over him. 

Blonde hair swept up into two prominent V-shaped peaks. A smile that outshone the sun. A physique carved from pure granite. 

It was him. The Number One Hero. The Symbol of Peace. 

All Might. 

"A-All... Might..." Izuku choked out, his hand reaching upward before his body finally gave out, and he slipped into unconsciousness. 

Smack. Smack. Smack.

"Hey! Wake up! Hey!"

Izuku gasped, his eyes snapping open. The blue sky above him was blinding. He blinked rapidly, trying to orient himself, and found his face inches away from the towering visage of All Might, who was lightly tapping Izuku's cheek.

"Ah! Good! You're awake!" All Might boomed, stepping back and placing his hands on his hips. "Apologies about that! I didn't mean to get you caught up in my villain hunting. I don't usually make mistakes like this, but I was in high spirits on my day off in a new city!" 

Izuku scrambled backward, his heart hammering against his ribs like a trapped bird. It wasn't a dream. It wasn't a hallucination brought on by oxygen deprivation. All Might was standing right in front of him. 

"But, you were a big help!" All Might continued, laughing heartily. He held up two large, plastic soda bottles. Inside, the Sludge Villain was completely contained, swirling angrily but helplessly against the plastic. "I've captured the slimeball!"

Izuku's brain short-circuited. The number one hero... right here... he looks so different in person... I need an autograph! Where's my notebook?!

Izuku frantically searched the ground, finding his water-logged, burnt notebook lying open. He flipped it to a blank page—only to find an enormous, sweeping signature already dominating the two-page spread. 

"He already signed it!" Izuku screamed, bowing so fast and so furiously he nearly gave himself whiplash. "Thank you so much! This will be a family heirloom! I'll pass it down for generations!"

"Okay!" All Might said, giving a thumbs up. "Well, I must bring this fellow to the police! See you again on the other side of the screen!"

All Might crouched, the muscles in his tree-trunk legs bulging with terrifying tension. He was leaving. Already. 

Wait. 

Izuku hadn't asked him yet. He hadn't asked the one question that had been haunting him for ten years. The question that would define his entire existence. He needed to know. He needed the Symbol of Peace to tell him. 

"Wait!" Izuku cried out, reaching a hand forward. "I still have... things to ask you!"

"No time to wait!" All Might shouted. With a deafening boom that cracked the pavement beneath him, the Number One Hero launched himself into the sky, rocketing upward like a missile. 

He soared over the city, the wind rushing past him. But something felt heavy on his right leg. He glanced down. 

"Whoa, whoa, whoa!" All Might yelled, his eyes bugging out of his head. 

Izuku Midoriya was clinging to All Might’s leg for dear life, his face flapping in the extreme wind pressure, his eyes squeezed shut in absolute terror. 

"Hey, hey, hey! What are you doing?!" All Might shouted, trying to pry the boy off. "Your fanaticism is too much! Let go!"

"If I let go now... I'll die!" Izuku screamed, the wind tearing the words from his mouth. 

"Oh, right!" All Might realized. 

"I... I have a lot of things... I want to ask you directly!" Izuku shouted, burying his face into the fabric of All Might's pants. 

"Okay, okay! I get it! Just close your eyes and mouth!" 

All Might sighed, coughing slightly as a small trickle of blood escaped the corner of his mouth. He wiped it away quickly, adjusting his trajectory. He found a tall, isolated commercial building and angled his descent, landing on the roof with a heavy thud that rattled the ventilation units. 

Izuku immediately collapsed onto the hard roof, his legs turning to jelly, his entire body shaking violently. "My whole life just flashed before my eyes..." he whimpered. 

"Good grief," All Might sighed, turning his back on Izuku and walking toward the edge of the roof. "If you talk to the people downstairs, they'll let you out. I really must be going."

"Wait!" Izuku cried out, pushing himself up onto his knees. 

"No! I will not wait!" All Might snapped, his voice carrying a sudden edge of urgency that Izuku didn't understand. 

Izuku squeezed his eyes shut. The memory of the doctor's office, the memory of his mother crying, the memory of Bakugo's cruel laughter, the memory of the notebook burning. It all coalesced into a single, desperate lump in his throat. 

"Even if I don't have a Quirk!" Izuku screamed, his voice cracking, tearing through the silence of the rooftop. "Can I become a hero?!"

All Might stopped walking. 

Izuku kept his head bowed, the words spilling out of him like water from a broken dam. "Can even someone without a Quirk be like you?! I... I don't have a Quirk. I never have. And maybe because of that, people always make fun of me. They tell me I'm useless. They tell me I should just die. But... I think saving people is the coolest thing you can do. I want to save people with a fearless smile! I want to be the greatest hero, just like you!"

He finally looked up, his eyes shining with unshed tears, desperate for a shred of validation. 

But All Might was gone. 

In his place stood a skeletal, emaciated man. He wore baggy clothes that looked like they belonged to someone thrice his size. His face was gaunt, his eyes deeply sunken and shadowed, a prominent jawline jutting out beneath a mop of messy blonde hair. 

Izuku screamed. "W-Where did All Might go?! Who are you?! An imposter?!"

"I am All Might," the skeletal man said, a stream of blood erupting from his mouth as he spoke. 

"Ahhhhh!" Izuku shrieked, backing away. "No way!"

"You know how guys at the pool are constantly flexing and holding their breath to look buff?" the man sighed, wiping the blood from his chin and sitting down against the roof's railing. "I'm like that."

"No way..." Izuku whispered, his reality fracturing. "All Might is a giant... he saves everyone with a fearless smile... he's the Symbol of Peace..."

"A fearless smile, huh?" The man let out a dry, rattling chuckle. "Now that you've seen me like this, young man, make sure you don't write about it online. The Symbol of Peace cannot be broken."

With trembling hands, All Might lifted the hem of his oversized white t-shirt. Izuku gasped, his hands flying to his mouth. 

Covering the entire left side of the man's torso was a massive, horrific scar. It looked like a crater of mangled, purple flesh, a spiderweb of necrotic tissue radiating outward from a central point of absolute devastation. 

"An injury I got from an enemy's attack five years ago," All Might explained, his voice low and devoid of its usual bombast. "Half my respiratory organs were destroyed, and I lost my whole stomach. I've become emaciated from repeated surgeries and the aftereffects. Right now, I can only do hero work for about three hours a day."

"Five years ago?" Izuku murmured, his encyclopedic brain racing. "Was that when you fought Toxic Chainsaw?"

"You know your stuff," All Might noted, offering a weak smile. "But no. That punk couldn't defeat me. This fight was not made public to the world. I asked that it not be made public. I will save people with a smile! The Symbol of Peace cannot be daunted by evil. I smile to show the pressure of heroes and to trick the fear inside of me."

All Might dropped his shirt, the gruesome scar vanishing from sight, though the image was forever burned into Izuku's mind. 

"Pro Heroes are always risking their lives," All Might said, his sunken blue eyes locking onto Izuku with an intensity that made the boy shrink back. "Some villains just can't be beaten without Quirks. So, no. I honestly don't think you can become a hero without a Quirk."

The words struck Izuku like a physical blow. He felt the air leave his lungs. It wasn't an insult. It wasn't Bakugo's malicious mockery. It was a calm, objective statement of fact from the man who defined heroism. 

"I see..." Izuku whispered, his vision blurring. 

"If you want to save people, you can always become a police officer," All Might suggested gently, standing up and dusting off his baggy pants. "They get mocked because villains are often delivered to their doorstep, but it's a fine profession. It's not bad to dream, young man. But you have to consider what's realistic."

With those final, devastating words, All Might opened the roof access door and disappeared down the stairwell, leaving Izuku utterly alone under the glaring afternoon sun. 

The door clicked shut. 

The sound echoed in Izuku's mind. It was the sound of a coffin closing. It was the final, definitive end to a ten-year delusion. Bakugo was right. The teacher was right. The doctor was right. 

Izuku fell to his knees on the sun-baked concrete. He didn't cry. He was too hollow to cry. The core of his identity, the burning, desperate flame that had kept him going through a decade of torment, had just been snuffed out by the very man who had ignited it. 

He was Quirkless. He was useless. He would never be a hero. 

Izuku didn't know how long he stayed on that roof. The sun began its slow descent, casting long, orange shadows across the sprawling cityscape. Eventually, the instinct to return home took over. He stood up on numb legs, pushed open the metal door, and began the long walk down the stairs. 

His mind was a void. He walked through the bustling streets of Musutafu, oblivious to the people around him. He didn't look up. He didn't listen to the chatter. He just watched the tips of his red shoes scuff against the pavement, one step after another. 

What now? he thought. What do I do tomorrow? Do I just... go to school? Do I just accept it? Do I throw away my notebooks?

BOOM!

The sudden, earth-shaking explosion snapped Izuku out of his trance. He stopped in his tracks, blinking rapidly. Plumes of thick, black smoke were billowing into the sky just a few blocks away. The distant wail of sirens pierced the air. 

Before he could even process what he was doing, Izuku’s feet were moving. It was muscle memory. Ten years of chasing villain fights, of analyzing Quirks, of pretending he belonged in that world. He ran toward the smoke. 

He rounded a corner and found himself at the edge of a massive crowd. A small shopping district, Tatooin Station, was engulfed in chaos. Several buildings were on fire, the flames licking hungrily at the brick facades. The heat radiating from the alleyway was oppressive, thick with the smell of burning plastic and shattered glass. 

Izuku pushed his way to the front of the crowd, stopping just behind the police tape. 

Several Pro Heroes were on the scene. Death Arms, a man with incredible physical strength, was struggling to hold up a collapsed billboard. Kamui Woods, a rising star with wood-manipulation abilities, was desperately trying to navigate the flames, but his wooden body was too susceptible to the intense heat. Mt. Lady, the giantess who had debuted earlier that morning, was stuck at the entrance of the alley, her massive size rendering her useless in the narrow, two-lane street. 

"Why aren't the heroes doing anything?" a man next to Izuku muttered. 

"They can't get close," another replied. "The villain has a hostage. And the villain's body is made of some kind of fluid... they can't grab him, and the hostage keeps setting off explosions!"

Izuku's blood ran cold. Explosions?

He leaned forward, peering through the smoke and the chaos. In the center of the inferno, rising like a demonic entity, was the Sludge Villain. 

No, Izuku thought, his breath catching in his throat. It can't be. All Might captured him. He had him in the bottles...

Then, a sickening realization washed over him. When he had grabbed All Might's leg, the hero had panicked. He had dropped the bottles. The villain had escaped because of him. Because of Izuku's selfish, desperate need to ask a question he already knew the answer to. 

This is my fault, Izuku realized, his hands trembling violently. The heroes can't do anything... and it's my fault.

Izuku looked closer at the villain, trying to see the hostage. Through the swirling mass of dark green sludge, he saw a uniform. The black gakuran of Aldera Junior High. 

Then, the sludge shifted, and Izuku saw his face. 

Katsuki Bakugo. 

Bakugo was thrashing wildly, his face contorted in a mixture of rage and sheer terror. He was firing explosions from his palms, but the blasts were only feeding the fires around them, doing nothing to dislodge the villain. The sludge was creeping up Bakugo's neck, forcing its way into his mouth and nose. 

Bakugo’s crimson eyes darted wildly through the crowd. For a fraction of a second, his eyes locked onto Izuku's. 

It wasn't a look of anger. It wasn't a look of superiority. It was a look of absolute, desperate, silent begging. It was the look of a boy who knew he was about to die. 

In that infinitesimally small moment, something inside Izuku snapped. 

The fear, the logic, the crushing reality that All Might had just handed him—it all evaporated. His brain stopped thinking. His body took over. 

Izuku threw his yellow backpack at the villain and sprinted past the police tape. 

"Hey! Stop! You idiot! Stop!" Death Arms roared, reaching out to grab him, but Izuku ducked under his arm, his red shoes pounding against the pavement. 

The heat was agonizing, blistering his skin, but Izuku didn't care. He was sprinting directly toward a monster that had nearly killed him an hour ago. He had no plan. He had no Quirk. He was running on pure, unadulterated instinct. 

"Deku?!" Bakugo gurgled through the sludge, his eyes wide with shock. 

"What the hell are you doing?!" the Sludge Villain roared, recognizing the boy. "You again?! Die!"

The villain whipped a massive, spiked tendril of hardened sludge directly at Izuku's head. 

Duck! 

Izuku threw himself to the ground, scraping his knees against the asphalt as the tendril whistled inches above his hair. He scrambled back to his feet, lunging forward, his hands outstretched toward Bakugo. 

He dug his bare hands into the sludge, trying to pry it away from Bakugo's face, just as he had done in the tunnel. It was useless. The sludge was too thick, too slippery. 

"Why are you here?!" Bakugo choked out, coughing up slime. 

"My legs moved on their own!" Izuku screamed, tears streaming down his face. "I don't know why! But... but you looked like you were asking for help!"

The Sludge Villain laughed, a deep, bubbling sound. "Fools. Both of you! You can die together!"

The villain reared back, gathering a massive amount of sludge into a giant, hardened fist, aiming it squarely at Izuku’s back. 

"Kid! Move!" Kamui Woods screamed, realizing he wouldn't reach him in time. 

At that exact moment, Bakugo, in a blind panic, let off a massive, point-blank explosion from his right hand. The blast didn't hit the villain. It hit the pavement inches from Izuku's face. 

The concussive force deafened Izuku. The intense, searing heat of the explosion washed over him. The impending death from the villain's fist loomed above him. 

Absolute, terminal danger. Extreme psychological devastation. 

Izuku Midoriya's body had reached its absolute limit. And in that crucible of fire, fear, and imminent death, a biological failsafe was triggered. 

Deep within Izuku's DNA, past the double-jointed pinky toe, past the genetic markers of his parents, lay a dormant, microscopic sequence. It was a genetic lock, buried millions of years in the past, an evolutionary anomaly that had skipped a thousand generations. It required a specific, impossible catalyst to awaken: the absolute breaking point of human endurance, coupled with the primal need to survive and protect. 

The lock shattered. 

Izuku screamed, but it wasn't a sound of pain. It was a sound he had never made before. It was guttural, harsh, and feral—like the roar of something ancient waking from a long, dark sleep. 

A blinding, emerald-green energy erupted from Izuku's forearms. It wasn't fire. It wasn't electricity. It was the raw, luminescent manifestation of life itself. 

The Pro Heroes shielded their eyes. The Sludge Villain hesitated, reeling back from the sudden, intense light. 

Izuku felt a sensation unlike anything he could comprehend. It wasn't painful, but it was violently intense. He felt his bones shifting, expanding, lengthening. He felt his skin hardening, tearing away the fragile human epidermis and replacing it with something infinitely denser. He felt his fingernails extending, hardening into something terrifyingly sharp. 

The green light dissipated in an instant. 

Izuku stood before the villain, his arms raised. But they were no longer the arms of a frail, fourteen-year-old boy. 

From the elbow down, Izuku’s arms had transformed. They were massive, heavily muscled, and covered in thick, interlocking, emerald-green scales that shimmered in the firelight. His hands were gone. In their place were the terrifying appendages of an apex predator from the Cretaceous period. Three massive, scythe-like claws, each over two feet long, curved menacingly from his scaled fingers. They were bone-white, razor-sharp, and gleamed with a deadly, primal intent. 

He had manifested the arms of a Therizinosaurus. 

A stunned silence fell over the burning alleyway. The roaring flames seemed to quiet. Even Bakugo stopped struggling, his crimson eyes locking onto the monstrous, scaly limbs extending from his childhood punching bag. 

Izuku didn't understand what had happened. He didn't know what these arms were or how they had appeared. He only knew one thing. 

He had a weapon. 

"Let him go!" Izuku roared, his voice carrying a strange, unnatural resonance. 

He swung his right arm. The movement was instinctual, fueled by a genetic memory he didn't know he possessed. The three massive claws sliced through the air with a terrifying shwing, tearing into the Sludge Villain's fluid body. 

Unlike a blunt punch, which the fluid absorbed, the razor-sharp claws severed the villain's molecular bonds, slicing through the viscous mud like a hot knife through butter. The villain shrieked in agony—actual, physical agony—as the claws cleaved a massive gap in its form. 

Izuku didn't stop. He spun, driving his left claws into the mass holding Bakugo's face, pulling outward with immense, inhuman strength. The sludge tore away, freeing Bakugo's mouth and nose entirely. 

Bakugo gasped, inhaling deep, desperate lungfuls of soot-filled air. He collapsed forward, falling out of the villain's grasp. 

"You little brat!" the Sludge Villain screamed, its massive eyes shrinking in fury. It coalesced its remaining mass, forming a dozen sharp tendrils, aiming them all at Izuku. "I'll kill you! I'll tear you apart!"

Izuku stood his ground, crossing his scaled, clawed arms in front of his face to protect Bakugo, who was coughing on the ground behind him. He braced for the impact, ready to fight, ready to use this strange, terrifying new power. 

But he didn't have to. 

A hand clamped down on Izuku's shoulder. A massive, familiar hand. 

"I really am pathetic," a deep, booming voice echoed through the alley. 

Izuku gasped, looking over his shoulder. Standing behind him, blood trickling from his mouth, steam rising from his incredibly muscular body, was All Might. He had transformed back. He had pushed past his absolute limit. 

"All Might..." Izuku whispered. 

"I told you the traits that make a great champion," All Might said, his eyes burning with an intense, furious light as he glared at the Sludge Villain. "But I didn't live up to my own ideals! Pros are always risking their lives!"

All Might grabbed Izuku and Bakugo by the collars of their shirts, pulling them safely behind him. He planted his feet, gripping his right wrist with his left hand, pulling his arm back so far the muscles threatened to tear through his skin. 

"DETROIT... SMASH!"

All Might threw the punch. 

The shockwave was apocalyptic. The air pressure alone extinguished the fires burning in the alleyway instantly. The Sludge Villain didn't even have time to scream before it was completely atomized, its fluid body blasted into microscopic droplets that splattered against the brick walls. The sheer force of the wind created a localized tornado that tore upward, spiraling into the sky. 

Izuku shielded his face with his massive, scaly arms, digging his claws into the asphalt to keep himself and Bakugo from being blown away by the hurricane-force winds. 

Then, it was over. 

The wind died down. The alley was completely silent, save for the sound of All Might panting heavily. Izuku looked up. The sky, which had been clear and orange moments before, was now choked with dark, swirling clouds. 

A single drop of water hit Izuku's cheek. Then another. 

"Rain?" Death Arms muttered, looking up in awe. "The air pressure... he changed the weather."

The crowd erupted into deafening cheers. "All Might! All Might! All Might!"

Izuku sat on the wet pavement, the rain washing the soot from his face. The adrenaline that had spiked his heart rate to lethal levels began to crash. He looked down at his arms. The massive, terrifying claws. The thick, green scales. 

He focused his mind, willing them to disappear. A flash of emerald energy washed over his limbs, and the scales retracted, the bone shifting back, the claws melting away until all that remained were the pale, trembling hands of Izuku Midoriya. 

I... I have a Quirk? Izuku thought, staring at his palms. After ten years... I have a Quirk?

The exhaustion hit him like a freight train. The caloric drain of altering his genetic structure so violently, combined with the extreme emotional stress, was too much for his unconditioned body to handle. 

His vision tunneled. The sounds of the cheering crowd, the sirens, and Bakugo’s ragged breathing faded into a distant echo. 

Izuku swayed, his eyes rolling back in his head. He slumped forward, collapsing onto the wet asphalt, the world plunging into absolute darkness.

He didn't see Bakugo staring at his unconscious body, his crimson eyes wide with a mixture of fury, confusion, and a strange, grudging respect. He didn't see All Might glancing over his shoulder, looking at the scrawny, green-haired boy who had just shamed the Number One Hero into action. 

He didn't know it yet, but Izuku Midoriya had just taken his first step on the path. He was no longer the Quirkless victim. He had awakened the apex predator within. 

And the food chain of hero society was about to change forever.

The rhythmic, synthetic beep... beep... beep... of a heart monitor was the first thing to pierce the dark veil of Izuku’s unconsciousness. 

It was a sterile, hollow sound, one that slowly anchored his drifting mind back to reality. Next came the smell: harsh antiseptic, bleached linens, and the faint, underlying scent of rubbing alcohol. It was a cocktail of odors that immediately registered as 'hospital.' 

Izuku’s eyelids fluttered, feeling as heavy as lead doors. He forced them open, wincing as the harsh, fluorescent lights of a private hospital room assaulted his retinas. He blinked rapidly, his vision swimming before finally focusing on the white acoustic ceiling tiles above him. 

His body felt incredibly heavy, as if someone had replaced the marrow in his bones with wet sand. Every muscle ached with a dull, throbbing intensity, similar to the aftermath of a severe flu, only magnified tenfold. He tried to shift his arms and found them resting atop crisp, white blankets. He flexed his fingers. Pale, human fingers. 

Was it a dream? 

The sludge. The fire. Kacchan’s terrified face. The blinding green light. The massive, scaly claws tearing through the villain. Had it all been the frantic, dying hallucination of a Quirkless boy suffocating in a dark alleyway?

"Izuku?"

The voice was fragile, trembling on the edge of a sob. 

Izuku turned his head slowly. Sitting in a plastic chair beside the bed was his mother, Inko Midoriya. She looked exhausted. Her green hair was disheveled, her eyes were red and swollen from crying, and she was clutching a crumpled tissue in both hands. 

"Mom...?" Izuku’s voice was hoarse, his throat dry and scratchy. 

"Oh, Izuku!" Inko choked out, throwing herself forward. She wrapped her arms around his chest, burying her face into his hospital gown, her shoulders shaking violently. "You're awake! Oh, thank goodness, you're awake! I was so scared... when the police called... when they said you were in the middle of a villain attack... I thought I lost you!"

"I'm sorry, Mom," Izuku whispered, weakly raising a hand to stroke her back. "I didn't mean to worry you. I just... I had to..."

He stopped. The memory hit him with the force of a physical blow. The absolute certainty of the moment. The emerald light. The sensation of his arms shifting, expanding, weaponizing. 

"Mom," Izuku breathed, his eyes widening. "My arms. In the alleyway. I... I had claws. Giant, green claws. And scales. Did... did you see the news? Was it real?"

Inko pulled back, sniffing loudly as she wiped her eyes. She looked at him with a mixture of overwhelming relief and profound bewilderment. Before she could answer, the door to the hospital room clicked open. 

A tall man in a pristine white coat walked in, carrying a digital tablet. He had a kind face, framed by wire-rimmed glasses, and a stethoscope draped casually around his neck. 

"Ah, Midoriya-kun. Good to see you awake," the doctor said, offering a reassuring smile. He tapped the screen of his tablet a few times. "I am Dr. Takeda. I'm the lead Quirk Specialist here at Musutafu General. How are we feeling? Any nausea? Vertigo? Phantom limb sensations?"

"Just... tired," Izuku admitted, his analytical mind immediately latching onto the doctor's title. Quirk Specialist? Not a pediatrician? "And my muscles ache. Doctor... what happened to me?"

Dr. Takeda pulled up a stool to the opposite side of the bed and sat down, crossing his legs. He looked at Izuku, then at Inko, before letting out a soft sigh. "What happened, young man, is that you just gave the medical community a puzzle that we'll be writing papers on for the next decade."

Izuku’s breath hitched. 

The doctor turned the tablet around, displaying a highly detailed, three-dimensional scan of Izuku’s skeletal and muscular structure. Next to it was a sprawling, complex string of DNA code, with certain segments highlighted in a brilliant, pulsing emerald green. 

"When you were brought in, you were suffering from acute caloric depletion and extreme physical exhaustion," Dr. Takeda explained, his tone shifting into a professional, academic cadence. "We ran a full battery of tests. Blood work, MRIs, and a deep-sequencing genetic scan to see if you had sustained any internal damage from the villain's attack. What we found instead was... unprecedented."

The doctor zoomed in on the DNA strand. "Mrs. Midoriya, ten years ago, a doctor told you and your son that because he possessed two joints in his pinky toe, he was Quirkless. A relic of human evolution. Correct?"

Inko nodded, fresh tears welling in her eyes. "Yes. He said Izuku would never develop a power."

"That doctor," Takeda said, his voice carrying a hint of professional disdain, "was utilizing outdated diagnostic criteria. The pinky-toe joint is a common biological marker for Quirklessness, yes. But it is not an absolute law of biology. Biology is messy. It is chaotic."

Izuku leaned forward, ignoring the ache in his muscles. "What do you mean?"

"Midoriya-kun, you are not Quirkless. You never were," Dr. Takeda said, his words dropping like atomic bombs in the quiet room. "You possess a Quirk Factor. A remarkably powerful one, at that."

Izuku stared at him. The room seemed to tilt. Ten years of bullying. Ten years of Bakugo’s explosions. Ten years of shattered dreams. I wasn't broken?

"Then... why?" Izuku whispered, his voice trembling. "Why did it take ten years? Why did it only happen today?"

Dr. Takeda leaned forward, his expression dead serious. "Because your Quirk was locked behind a biological failsafe. Epigenetics, Midoriya-kun. The study of how behaviors and environment can cause changes that affect the way your genes work. Most Quirks manifest naturally by age four as the body’s Quirk Factor matures. Yours, however, is what we classify as an 'Extreme-Catalyst Late-Blooming Transformation Type.'"

The doctor tapped the screen, bringing up images of prehistoric animals. A Tyrannosaurus, a Triceratops, a Velociraptor. 

"Your Quirk is tied to something called 'genetic memory' or 'junk DNA,'" Dr. Takeda continued. "Embedded deep within your genetic code are the evolutionary blueprints of extinct fauna. Dinosaurs, prehistoric mammals, apex predators from millions of years ago. Your body possesses the ability to access these blueprints and alter your own cellular structure to mimic them."

Izuku's jaw dropped. His mind, trained for years to analyze Quirks, began to race at blinding speed. Cellular alteration? Genetic memory? That means... the Therizinosaurus arms... I didn't just create them. My body remembered them.

"However," the doctor cautioned, raising a finger. "To access such dramatic, ancient biological changes requires an immense amount of energy and a specific neurological trigger. Your body knew that if you activated this Quirk as a toddler, the sheer caloric and physical strain would have likely killed you. So, your DNA locked it away."

"A failsafe..." Izuku murmured. 

"Exactly. A genetic lock," Dr. Takeda nodded. "It required a massive, unprecedented spike of adrenaline and cortisol to break it. You had to be pushed past the absolute limits of human psychological and physical stress. The near-death experience of suffocating in the sludge, combined with the extreme danger of diving into a raging fire to save your friend... that was the key. Your brain believed you were going to die, so it shattered the lock and unleashed your Quirk to ensure your survival."

Inko let out a choked sob, covering her mouth with her hands. "My poor baby... you had to go through all that... just to..."

"Mom, don't cry," Izuku said, reaching out to grasp her hand. His own eyes were swimming with tears, but they weren't tears of sorrow. A massive, crushing weight that he had carried on his shoulders for a decade was lifting. The shadow of 'Deku' was fracturing in the light of this revelation. 

He looked at his hands. He wasn't useless. He wasn't a reject of evolution. He was the apex. 

"Do you have a name for it, Midoriya-kun?" the doctor asked, smiling warmly. "It's customary for the user to register the name of their Quirk once it manifests."

Izuku didn't even have to think about it. The words felt right, resonating with the ancient power he had felt coursing through his veins in that alleyway. 

"Primal Shift," Izuku said firmly, his voice steady. 

"Primal Shift," Dr. Takeda repeated, typing it into his tablet. "Fitting. Now, you need rest. Your body burned through thousands of calories in a matter of seconds. You're going to experience extreme hunger and fatigue for the next few days. Eat massive amounts of protein. We’ll discharge you tomorrow morning."

As the doctor left the room, Inko leaned over and kissed Izuku’s forehead. "I'm so proud of you, Izuku. You saved Katsuki. You were so brave."

Izuku closed his eyes, a genuine smile spreading across his face for the first time in years. I have a Quirk. I have a Quirk. I can be a hero.

The media fallout from the Tatooin Station incident was immediate and intense. When Izuku was discharged from the hospital the next morning and returned to his apartment, the TV news was playing the footage on a loop. 

They praised Katsuki Bakugo’s incredible Quirk, noting his resilience in holding out against the villain for so long. The Pro Heroes were interviewed, excusing their inaction by citing the poor matchup of their abilities. 

And then, there was the mention of the "reckless middle schooler." The news anchors scolded Izuku for rushing in, claiming he had worsened the situation. But the footage didn't lie. The camera feeds caught the brilliant flash of emerald light, the manifestation of the monstrous, scaly arms, and the sheer, brutal efficiency with which Izuku had freed Bakugo. The internet was already buzzing with rumors of the "Dinosaur Boy."

Izuku sat at his desk in his bedroom, tuning out the television in the living room. Before him lay a brand-new, pristine notebook. He had bought it on the walk home from the hospital. 

He clicked his pen, his hand shaking slightly with excitement, and wrote on the cover in bold, black letters: 

My Quirk Analysis: Primal Shift. Vol. 1.

He flipped to the first page and began to map out his new existence. 

Quirk: Primal Shift.

Type: Transformation.

Description: Allows the user to alter their cellular structure to mimic the biology of extinct prehistoric fauna through genetic memory.

Izuku stared at the page, tapping his pen against his chin. He needed to test the limits. The doctor had said full transformations would be deadly if he wasn't prepared, but partial transformations—like his arms—were clearly possible. 

"Okay," Izuku whispered to himself, standing up and moving to the center of his small room. "Let's see what else I can do. I need to be careful. No massive limbs. Small changes."

He closed his eyes, focusing inward. He remembered the feeling in the alleyway. It wasn't a conscious flexing of a muscle; it was a mental shift, like opening a door in his mind that had always been painted shut. 

I need better vision, Izuku thought. The king of predators. Tyrannosaurus Rex. They had some of the best binocular vision of any animal in history.

He reached for that primal blueprint. He felt a sudden, sharp heat behind his eyes. A soft, emerald glow illuminated the dim room for a split second. 

Izuku opened his eyes. 

The world had fundamentally changed. His bedroom was no longer just a room; it was a hyper-detailed landscape of sensory information. The colors were impossibly vibrant, separated into distinct spectrums he had never seen before. He could see the microscopic dust motes dancing in the shaft of sunlight coming through his window. He could see the intricate, interwoven fibers of the carpet. He looked out his window and could perfectly track the trajectory of a fly buzzing three blocks away. 

He rushed to the mirror on his closet door. 

Staring back at him was his own face, but his eyes were completely transformed. The sclera had turned a deep, reptilian amber, and his pupils had narrowed into sharp, vertical, predatory slits. 

"Incredible..." Izuku breathed, his voice barely a whisper. But as he spoke, a sudden, splitting headache pierced his skull. The sheer volume of visual data was overwhelming his human brain. He squeezed his eyes shut, cutting off the flow of energy, and felt his eyes revert to their normal, round, green state. He stumbled backward, panting. 

Note to self, Izuku scribbled furiously in his notebook. Enhanced sensory shifts require immense mental processing. Prolonged use leads to severe migraines.

"What about defense?" he muttered. Stegosaurus? No, Ankylosaurus. The living tank.

He focused on his left forearm. He visualized the armored scutes of the prehistoric herbivore, the dense, osteoderm-plated skin. 

Flash.

The emerald energy washed over his arm. The skin bubbled and hardened instantly, shifting from pale flesh into thick, overlapping plates of dark brown, bone-like armor. It felt heavy, dragging his arm down slightly. 

Izuku picked up a pair of metal scissors from his desk. He took a deep breath, braced himself, and drove the sharp point of the scissors hard into his armored forearm. 

Clang.

The scissors bounced off the scales without leaving a single scratch, the force jarring Izuku’s wrist. He felt the impact, but absolutely no pain. 

"Yes!" Izuku cheered, immediately releasing the shift. His arm returned to normal, though his stomach gave a loud, protesting rumble. The caloric drain was already kicking in. 

He spent the next three hours mapping out partial shifts. He discovered he could change his legs into the digitigrade limbs of a Deinonychus (a raptor), granting him incredibly powerful spring-loaded leg muscles. He could shift his teeth into the serrated jaws of a Megalodon—though he quickly reverted that, as his human mouth wasn't large enough to accommodate them comfortably. 

But there was a darker side to the testing. 

When Izuku attempted a slightly larger shift—trying to turn his entire torso into the armored hide of a Triceratops—the cost was immediate and terrifying. The green energy flared wildly. Izuku felt his ribs cracking and expanding, his spine shifting violently. He collapsed to the floor in absolute agony, gasping for air as his body fought to maintain the massive biological alteration. 

Worse than the pain was the feeling. A cold, primal instinct washed over his mind. A profound, consuming rage. A desire to ram, to crush, to destroy whatever was in front of him. The 'genetic memory' wasn't just physical; it was psychological. The beast was in his head. 

Terrified, Izuku cut the power. He reverted instantly, lying on his bedroom floor in a pool of cold sweat, his heart hammering in his chest. His stomach felt like a gaping, black void. He was starving. 

Full shifts are too dangerous, Izuku wrote, his hand trembling as he forced down a massive plate of leftover katsudon his mother had left in the fridge. My body isn't strong enough to handle the sheer mass change, and my mind isn't disciplined enough to fight the primal instincts. I need to train my base body. I need to be stronger before I can truly use this Quirk.

But despite the danger, despite the exhaustion, Izuku couldn't wipe the smile off his face. 

He was in the game. 

The sun had barely breached the horizon the next morning, casting a pale, violet light over the quiet streets of Musutafu. The city was asleep, save for a few early commuters and the occasional stray cat. 

Izuku stood at the end of a long, straight residential street, clad in his gym uniform. He stretched his legs, taking deep, steadying breaths. He had eaten a massive breakfast—three eggs, a mountain of rice, and half a pound of grilled fish—to fuel his experiment. 

He needed to test his mobility. 

Izuku closed his eyes, focusing on the genetic memory of a Velociraptor. Not the massive movie monsters, but the sleek, feathered, hyper-agile predators of reality. 

Flash.

The emerald energy spiraled down his legs. His sweatpants bulged and tore slightly at the cuffs as his human legs elongated. The bone structure snapped into a digitigrade stance—walking on the toes rather than the flat of the foot. Thick, corded muscles wrapped in green and brown scales replaced his calves and thighs. Three massive, gripping talons burst from his shoes, shredding the red canvas. 

Izuku opened his eyes and looked down. He was standing several inches taller, balancing perfectly on his raptor legs. 

He leaned forward, shifting his center of gravity. 

And he ran. 

The acceleration was instantaneous. It felt like being fired from a cannon. His scaly talons dug into the asphalt, propelling him forward with explosive, terrifying force. The wind whipped past his ears, tearing tears from his eyes. The world blurred into streaks of grey and green. He wasn't running; he was hunting. 

He cleared a three-block stretch in less than four seconds. 

"Whoa!" Izuku shouted, trying to slow down. But human braking mechanisms didn't apply to raptor legs. He panicked, lost his footing, and went tumbling head over heels, scraping his elbows against the pavement before crashing into a pile of garbage bags at the end of an alleyway. 

The green energy flared, and his legs reverted to normal. 

Izuku groaned, sitting up and rubbing his bruised shoulder. He looked back at the distance he had just covered, his eyes wide with awe. "That speed... it's incredible. If I can learn to control the deceleration..."

"A remarkable display of agility, young man!" 

Izuku shrieked, scrambling backward like a frightened crab. 

Standing at the entrance of the alleyway, looking like a walking skeleton in an oversized tracksuit, was the man who had shattered his dreams just two days prior. 

"All Might?!" Izuku gasped. 

The skeletal man raised a hand in a peaceful gesture, though he immediately hunched over and coughed up a small spray of blood. "Apologies for startling you. I've been looking for you, Midoriya-kun. I checked your apartment, and your mother said you went for an early morning run."

Izuku slowly got to his feet, dusting off his gym clothes. He looked at the Number One Hero, a mix of emotions swirling in his chest. Awe, respect, and a lingering, painful resentment for what had happened on the roof. 

"You... you were looking for me?" Izuku asked cautiously. 

All Might nodded, his sunken blue eyes locking onto Izuku with a serious, intense gaze. He walked forward, stopping just a few feet away. 

"I came to thank you, to revise my statement, and to propose something to you," All Might said, his voice quiet but commanding. "If you hadn't been there in that alleyway... if you hadn't told me about your life... I would have been nothing but a fake in a muscle suit. I would have let a boy die because I was afraid of pushing my own limits."

Izuku’s eyes widened. "No... that's not true! It was my fault! I distracted you, and you dropped the villain! If I hadn't—"

"I am not done," All Might interrupted firmly. "You told me you didn't have a Quirk. And yet, when every Pro Hero with incredible powers stood frozen, paralyzed by the matchup and the fear... it was you, the boy who believed he was Quirkless, who moved first."

All Might dropped to one knee, bringing himself down to Izuku’s eye level. 

"Top heroes have stories about them from their school days," All Might said softly. "Most of their stories have one thing in common: their bodies moved before they had a chance to think."

Tears pricked the corners of Izuku’s eyes. He knew those words. He had studied every interview All Might had ever given. 

"That was true for you, wasn't it?" All Might asked. 

Izuku covered his mouth with his hands, his knees trembling. The memory of the sludge, of Kacchan’s desperate eyes, of the sheer terror and the overwhelming compulsion to save him. 

"Yes," Izuku sobbed, the tears finally breaking free. 

All Might smiled, a genuine, warm smile that belonged to the Symbol of Peace, even without the muscles. 

"You can become a hero."

It was the sentence. The absolute, definitive validation that Izuku had craved his entire life, delivered by the god of his world. Izuku fell to his knees, burying his face in his hands, weeping uncontrollably. The pain of the last ten years washed away in the flood of his tears, cleansed by the words of the man he idolized. 

All Might let the boy cry for a few moments, placing a comforting, bony hand on his shoulder. 

"However," All Might said, his tone shifting back to business. "I must ask. When I told you on the roof that you were Quirkless, you accepted it. Yet, in the alleyway, you manifested an incredibly powerful physical transformation. Care to explain, young man?"

Izuku sniffled, wiping his nose with the back of his sleeve. He looked up at All Might and gave him the abbreviated version of Dr. Takeda’s diagnosis. He explained the genetic lock, the late manifestation, and the concept of Primal Shift. 

All Might listened intently, his eyes widening in surprise. "Fascinating. A Quirk locked away by the body's own survival instincts, only to be unleashed by an act of absolute selflessness. It is poetic, in a way."

"It's powerful," Izuku admitted, looking at his hands. "But it's dangerous. The doctor said if I use a full transformation right now, the physical strain will tear my body apart. I have to train my base form first."

"Which brings me to my proposal," All Might said, standing back up. "You are worthy to inherit my power."

Izuku blinked, his brain grinding to a halt. "...Huh?"

All Might threw his head back and let out a rattling laugh. "Hahaha! You should see your face! It's a proposal! The real work begins here. Listen well, my boy. I want you to inherit my Quirk."

"Inherit... your Quirk?" Izuku parroted, utterly bewildered. "But Quirks are genetic. You can't just give someone a Quirk. That's scientifically impossible!"

Izuku immediately began to mutter, a habit born from years of rapid-fire analysis. "Wait, is this a metaphor? Or maybe a side effect of his power? No, he's the Symbol of Peace, he wouldn't lie. But the biological implications of transferring a Quirk Factor are staggering. Does it alter the recipient's DNA? How does the immune system not reject the foreign genetic material? And what is his Quirk anyway? Super strength? Invulnerability? The internet says it's a mutation, but..."

"Stop, stop, stop!" All Might waved his hands, looking exasperated. "You're overthinking it! And muttering! Stop muttering!"

Izuku snapped his mouth shut, his cheeks burning red. 

"I am hiding a lot of things, it's true," All Might said, his expression turning solemn. "But I do not lie. The power I possess was passed down to me, like a sacred torch."

He held up his hand, curling his fingers into a loose fist. A faint, golden aura seemed to pulse around it. 

"My Quirk is called One For All."

"One... For All," Izuku breathed, the name echoing with a strange, heavy resonance. 

"Yes," All Might nodded. "One person cultivates the power, stockpiling it within themselves, and passes it on to another person, who also cultivates it, stockpiling it further, and passes it on. It is the crystallization of power, created by the voices of those who cry out for help with courageous hearts."

"Why... why would you give something so incredible to me?" Izuku asked, his voice trembling. "I just awakened my own Quirk. Wouldn't someone else be better? Someone who already has years of experience with their powers?"

All Might looked at Izuku, his eyes softening. "I have been searching for a successor for a long time. I considered many strong, capable candidates. But then, I saw a boy who believed he had nothing, rushing into the fires of certain death to save someone who had just mocked him. You possess the heart of a true hero, Midoriya. And now, you possess a Quirk that, while powerful, clearly takes a toll on your body."

All Might stepped forward, placing both hands on Izuku’s shoulders. 

"Imagine it, my boy," All Might said, his voice rising in passion. "One For All enhances the user's base physical abilities to unimaginable levels. If you inherit my power, it will reinforce your body. It will give you the physical strength and durability necessary to handle your Primal Shift without destroying yourself. Your transformations, supercharged by the stockpiled power of One For All... you would be unstoppable. A true Symbol of Peace."

Izuku stared at All Might, his mind reeling. 

To have a Quirk was all he had ever wanted. Now, he had Primal Shift. He had the power of the apex predators, the rulers of the ancient world. But to combine that with One For All? The ultimate power of the present? The legacy of the Symbol of Peace? 

It was a terrifying prospect. The burden would be astronomical. The expectations, crushing. If he accepted, his life would never be simple again. He would be stepping into a war he didn't fully understand. 

But he remembered Kacchan’s face in the sludge. He remembered the feeling of helplessness on the rooftop. He remembered the sheer, intoxicating rush of tearing through the villain to save a life. 

Izuku didn't hesitate. He looked up at All Might, his green eyes burning with a fierce, uncompromising determination. 

He didn't just want to be a hero anymore. He wanted to be the greatest hero the world had ever seen. 

Izuku took a step back, stood at attention, and bowed deeply. 

"I accept!" Izuku shouted. "Please, All Might! Train me! Pass it on to me!"

All Might smiled, a fierce, proud grin that showed all his teeth. 

"An immediate answer. That's what I expected," All Might said. "But do not take this lightly. As you are now, receiving One For All would cause your limbs to explode."

Izuku shot up, his face paling instantly. "Explode?!"

"Your body is weak, my boy!" All Might laughed, pointing at Izuku’s scrawny arms. "Your Primal Shift relies on genetic memory, but your human form is a flimsy vessel. If I pour a hundred percent of my stockpiled power into you right now, your body won't be able to contain it. You'd pop like a balloon!"

"O-Okay," Izuku stammered, rubbing his arms defensively. "So... how do we stop the exploding?"

"We rebuild the vessel," All Might declared, his eyes flashing. "U.A. High School's entrance exam is in exactly ten months. We have ten months to turn your fragile human frame into a body capable of wielding One For All, and capable of enduring your full Primal Shifts."

All Might turned and pointed toward the horizon, where the sun was fully cresting, painting the city in vibrant hues of gold and orange. 

"Your training begins tomorrow morning, Midoriya Izuku," All Might proclaimed, the booming, heroic cadence returning to his voice. "We will push you past your limits. We will break you down and build you back up. You will learn to tame the beasts within your blood, and you will learn to shoulder the legacy of One For All. Are you ready?"

Izuku looked at the rising sun. He felt the phantom weight of the Therizinosaurus claws on his hands. He felt the terrifying speed of the Velociraptor legs in his muscles. He felt the gaze of the Symbol of Peace resting entirely on his shoulders. 

He clenched his fists, taking a deep, steadying breath. 

"I'm ready."

The smell was the first thing that assaulted him, long before the ocean even came into view. It was a putrid, suffocating mixture of rusted iron, rotting seaweed, stagnant saltwater, and decades of decaying household garbage. 

Izuku Midoriya stood at the top of the concrete stairs overlooking Dagobah Municipal Beach Park, though calling it a beach was a cruel joke. It was a graveyard of human consumption. Mountains of discarded refrigerators, hollowed-out washing machines, rusted car frames, and shattered furniture stretched across the coastline, completely obscuring the sand and forming jagged, artificial cliffs against the crashing waves. 

"Wow..." Izuku muttered, pulling his track jacket tighter against the crisp morning breeze. "I knew it was bad, but this... this is an illegal dumping ground."

"Exactly!" 

All Might stood beside him, though not in the towering, muscle-bound form Izuku had first met. He was in his skeletal, deflated state, wearing an oversized white t-shirt and baggy cargo pants. He held a thick stack of stapled papers in his bony hand. 

"Dagobah Beach used to be a beautiful place," All Might explained, his sunken blue eyes scanning the metallic wasteland. "But because of the ocean currents, things wash up here. People started taking advantage of it, dumping their trash illegally to avoid disposal fees. It's a prime example of the bystander effect. Everyone assumes someone else will handle it, or that a Pro Hero with a telekinetic Quirk will eventually come and sweep it away."

All Might turned to Izuku, pointing a long, bony finger directly at his chest. "But heroes don't wait for someone else to do the heavy lifting. A hero's job is volunteering! It's about restoring the community, one piece of trash at a time."

Izuku looked at the mountains of garbage. "So... you want me to clean the beach?"

"I want you to conquer it!" All Might declared, his voice rising with theatrical flair as he shoved the thick stack of papers into Izuku's chest. "Behold! The 'Aim to Pass: American Dream Plan'!"

Izuku stumbled back slightly, taking the heavy packet. He flipped it open. It was incredibly detailed. It wasn't just a workout routine; it was a microscopic management of his entire existence for the next ten months. Sleep schedules. Caloric intake charts. Macronutrient breakdowns. Study periods for the written portion of the U.A. exam. And, most intimidating of all, a zone-by-zone map of Dagobah Beach, color-coded by the estimated weight of the debris.

"This... this is amazing," Izuku whispered, his inner analyst marveling at the sheer perfection of the schedule. "But All Might, if I just train my base body to inherit One For All, what about my Quirk? Dr. Takeda said I needed to practice my Primal Shift."

All Might grinned, a wide, skeletal smile that stretched across his gaunt face. He suddenly puffed up, transforming into his massive, muscle-bound form in a cloud of steam. 

"That is the beauty of the plan, young Midoriya!" All Might boomed, flexing his colossal biceps. "One For All requires a strong vessel! But your Primal Shift requires stamina and immense caloric burn! We shall kill two prehistoric birds with one stone! You will use your human form to lift the lighter debris to build your foundational strength. For the heavy items, you will utilize partial shifts! You will learn to control the beasts within you while simultaneously conditioning your body to handle the strain!"

Izuku looked back at the ocean of trash. A rusty, water-logged refrigerator sat at the bottom of the stairs. It had to weigh at least four hundred pounds. 

He clenched his fists. The fear was still there—the memory of the agonizing pain when he had tried to shift his entire torso. But the determination in his chest burned hotter. 

"Right," Izuku nodded, his green eyes hardening. "Let's do this."

The first month was absolute hell. 

Izuku’s alarm went off at 4:00 AM every single day. He would stumble out of bed, every muscle in his body screaming in agony, and force himself to jog the three miles to Dagobah Beach. 

His human body was woefully ill-equipped for the task. Dragging tires through the wet sand felt like pulling lead weights. His hands blistered, popped, and blistered again, developing thick, rough calluses. 

But the physical exhaustion of manual labor was nothing compared to the toll of integrating Primal Shift. 

On the third week, All Might pointed to a cluster of rusted washing machines bound together by thick, tangled industrial cables. "Move those, young Midoriya! But do not use your human hands. Show me your Quirk!"

Izuku stood before the rusted metal, closing his eyes. He reached into the deep, dark well of his genetic memory. He didn't want the razor-sharp claws of the Therizinosaurus; they would just slice the cables. He didn't need the speed of the Velociraptor. He needed raw, unadulterated, prehistoric pulling power. 

He searched the evolutionary blueprints. He found a behemoth of the ice age. 

Columbian Mammoth. 

Izuku inhaled sharply. The emerald energy sparked around his shoulders and cascaded down his arms. The pain was immediate and intense—a fiery sensation of his bones thickening, his muscles expanding exponentially. Thick, coarse, reddish-brown fur erupted from his skin. His arms widened, growing incredibly dense, packed with hyper-dense muscle fibers designed to topple trees.

But the shift didn't stop at his arms. Izuku focused the energy toward his face. 

His jaw cracked—a sickening sound that made All Might wince—and elongated. Two massive, curved, ivory tusks burst from his upper jaw, spiraling outward. His nose and upper lip fused, stretching and thickening into a powerful, prehensile trunk covered in rough fur. 

Izuku opened his eyes. His vision was slightly different, his peripheral sight expanded. He felt incredibly top-heavy. 

"Excellent!" All Might cheered, clapping his massive hands together. "A partial shift spanning multiple limbs and facial structures! Now, pull!"

Izuku wrapped his massive, furry arms and his thick trunk around the rusted washing machines. He planted his feet—still human, shaking under the sheer weight of his transformed upper half—and pulled. 

The cables groaned. The rust flaked off into the sand. The immense strength of the mammoth muscles flared to life. With a guttural, trumpeting grunt that sounded entirely inhuman, Izuku hoisted the machines off the sand, dragging them ten feet before his human legs buckled, sending him crashing to his knees. 

The green energy flashed, and he reverted instantly, gasping for air as if he had been submerged underwater. 

"Too... heavy..." Izuku panted, clutching his human arms, which were now trembling violently. 

All Might reverted to his skinny form, handing Izuku a water bottle. "Your Quirk's output is phenomenal, but your base body acts as the anchor. If the anchor is weak, the ship will sink. Keep pulling, Midoriya."

By the end of the second month, a new, terrifying problem emerged. 

Izuku was eating his mother out of house and home. 

"Izuku, sweetie..." Inko Midoriya said weakly, staring at the kitchen table. 

It was a Tuesday evening. Izuku sat at the table, wearing a tank top that revealed the nascent, wiry muscles beginning to form on his previously scrawny frame. In front of him were five empty bowls of rice, a stripped chicken carcass, and he was currently tearing into his fourth heavily marbled steak with a ferocity that bordered on feral. 

He paused, a piece of meat hanging from his mouth, his eyes wide. "Mmph?"

"Are you... are you sure this is healthy?" Inko asked, wringing her hands together. "You've eaten three days' worth of groceries in one sitting. I had to dip into the emergency savings just to buy enough beef for the week."

Izuku swallowed hard, suddenly feeling intensely guilty. "I'm sorry, Mom. It's my Quirk. Dr. Takeda said the shifts burn thousands of calories. If I don't eat enough protein, my body starts cannibalizing its own muscle tissue to fuel the transformations."

It was true. Izuku had discovered that a plant-based diet did absolutely nothing to fuel his powers. The ancient, predatory forms he took demanded meat. Red meat, chicken, fish—it didn't matter, so long as it was protein-dense. 

Inko sighed, her expression softening into a warm, determined smile. She walked over and ruffled his messy green hair. "Don't apologize, Izuku. You're training to be a hero. If my little boy needs to eat like a lion to save people, then I'll just have to learn how to cook half a cow!"

Izuku smiled, a genuine feeling of warmth spreading through his chest. "Thanks, Mom. I'll pay you back when I'm a Pro."

Months three through seven blurred into an agonizing, exhilarating routine. 

Izuku’s body began to change. The frail, trembling boy who had cowered before Bakugo was vanishing, replaced by a teenager forged in iron and sweat. His shoulders broadened. His core hardened into a grid of solid muscle. His legs, constantly forced to carry the weight of his partial shifts, grew thick and powerful. 

And as his human body grew stronger, his control over Primal Shift evolved dramatically. 

It was month six when he finally took to the skies. 

There was a massive, hollowed-out city bus perched precariously on top of a mountain of debris near the water's edge. It was too unstable to climb, and dragging it down would cause a hazardous avalanche of scrap metal. 

"How will you approach this, young Midoriya?" All Might asked, observing from a safe distance. 

Izuku analyzed the pile. "If I apply force to the bottom, the whole thing collapses. I need to lift it from the top. But I can't jump that high, even with raptor legs."

He closed his eyes. He visualized the sky rulers of the late Cretaceous. 

Quetzalcoatlus. One of the largest known flying animals of all time. 

Izuku focused the energy into his back. The pain here was always the sharpest. He fell to his hands and knees, grinding his teeth together as two massive protrusions erupted from his shoulder blades. The bones extended, lengthening out to a terrifying ten-foot wingspan on either side. Thick, leathery, dark-green membranes stretched between the elongated finger bones. 

He didn't just grow wings; his entire muscular structure around his chest and back shifted, expanding to anchor the massive appendages. 

Izuku stood up, a human boy bearing wings that could cast a shadow over a small house. He gave them a powerful flap. 

The downdraft kicked up a localized sandstorm. The sheer aerodynamic force lifted Izuku off his feet. He panicked for a second, his human instincts fighting the avian ones, but he forced his mind to surrender to the genetic memory. He angled his wings, catching the coastal breeze, and soared twenty feet into the air. 

"Magnificent!" All Might's voice barely reached him over the rushing wind. 

Izuku hovered over the bus. He let the wings hold him aloft while he initiated a secondary, simultaneous shift. He focused on his legs, transforming them into the powerful, gripping talons of a massive Pteranodon. 

He swooped down, sinking the scaly, bone-crushing talons into the rusted roof of the bus. He beat his massive leathery wings, the muscles in his back screaming in protest. Slowly, agonizingly, the bus lifted off the pile. He flew it thirty yards down the beach, dropping it safely into the designated clearing zone. 

When he landed and retracted the shifts, Izuku collapsed onto the sand, laughing breathlessly. He had flown. He was a Quirkless kid with extra joints in his toes, and he had just conquered the sky. 

But it wasn't all triumphs. The deeper he delved into the primal well, the more he felt the beasts pushing back. 

During month eight, while attempting a partial shift of an Ankylosaurus tail to smash a rusted truck frame, Izuku accidentally let the shift spread too far. The heavy armor crawled up his spine, encasing his torso. 

The world went red. 

Izuku lost all sense of self. The intellect of Izuku Midoriya vanished, replaced by the territorial, defensive rage of a frightened herbivore. He roared—a horrifying, guttural bellow—and swung his bone-club tail indiscriminately. He smashed the truck, then turned and swung at a pile of refrigerators, obliterating them. 

"Midoriya! Stop!" All Might shouted, running toward him. 

Izuku turned his armored, reptilian eyes toward the skeletal man. He didn't see his mentor. He saw a threat. He raised his tail to strike. 

Before he could swing, All Might transformed, crossing the distance in a fraction of a second. "TEXAS SMASH!" 

All Might didn't hit Izuku directly, but aimed a precisely controlled shockwave at the boy's chest. The concussive force knocked the breath out of Izuku, jarring his brain enough to break his concentration. The green energy sputtered, the armor dissolving instantly as Izuku hit the sand, unconscious. 

When he woke up, All Might was sitting beside him, looking uncharacteristically grim. 

"The genetic memory," All Might said softly. "It is not just physical, is it?"

Izuku sat up, rubbing his aching head, shame washing over him. "No. They... they get in my head. When I shift too much mass, the animal instincts overwhelm my human consciousness. I become the beast."

"Then you must never do a full-body transformation," All Might commanded, his tone brokering no argument. "Not until your mind and body are strong enough to dominate the instinct. If you lose control in a crowded city... you would become the very villain we are training you to fight."

Izuku looked at his hands, a shiver running down his spine. "I understand. Partial shifts only. I am the master of the shift. Not the other way around."

Ten Months Later. The Morning of the U.A. Entrance Exam.

The crisp morning air carried the salty tang of the ocean, but the smell of rotting garbage was completely gone. 

Dagobah Municipal Beach Park was pristine. 

The sun rose over a vast, unbroken expanse of golden sand. The crashing waves rolled smoothly onto the shore, unobstructed by rusted metal or discarded appliances. 

Standing atop the final, towering pile of gathered junk at the edge of the street was Izuku Midoriya. 

He was shirtless, his chest heaving with exertion. Sweat gleamed on skin that was no longer pale and soft, but tanned and corded with dense, defined muscle. His back was broad, his shoulders thick, and his core was a washboard of iron endurance. Ten months of hellish physical labor, combined with the constant, agonizing strain of his Primal Shifts, had forged him into a weapon. 

He threw his head back and let out a roar. It wasn't the roar of a dinosaur, but the triumphant scream of a human boy who had finally conquered his own weakness. 

"OH MY... GOODNESS!" 

All Might stood on the sidewalk below, in his muscle form, his jaw practically hitting the pavement. "You didn't just clear it... you went beyond the requested area! You cleaned the entire coastline! And with time to spare!"

Izuku looked down, panting, a wild, euphoric smile on his face. He swayed slightly, his legs finally giving out after the final push. He pitched forward, falling off the pile of scrap. 

In a flash of movement, All Might was there, catching the boy in his massive arms. 

"Excellent work, young Midoriya," All Might praised, gently setting Izuku on his feet. "You have surpassed all my expectations. Your vessel is ready. You have tamed your body, and you have sharpened your Quirk."

Izuku looked at his calloused, scarred hands. "I feel... I feel like a different person. I feel like I could punch a hole in a wall."

"You'll be doing much more than that soon," All Might chuckled. He reached up and grasped a lock of his iconic, golden blonde hair. With a sharp tug, he plucked a single strand free. 

All Might held the hair out to Izuku, his expression turning deadly serious. 

"This is it. The culmination of your hard work. The passing of the torch. To inherit One For All, you must consume some of my DNA."

Izuku stared at the single strand of hair fluttering in the ocean breeze. All the grandeur, all the epic speeches, all the build-up about sacred torches and the crystallization of power. 

"EAT THIS!" All Might commanded, his face incredibly intense. 

Izuku blinked. "Wait, seriously? I have to eat your hair?"

"It doesn't matter what it is as long as you take in my DNA!" All Might explained, suddenly looking flustered. "Come on! We don't have time! The exam starts in three hours, and it takes time for the power to digest and integrate with your nervous system! Eat it!"

Izuku grimaced, took the hair, closed his eyes, and swallowed it dry. It tickled his throat on the way down, causing him to cough violently. 

"Did it work?" Izuku croaked. "I don't feel any different. No glowing aura, no sudden urge to yell 'Smash'."

"Give it a few hours!" All Might laughed, transforming back into his skinny form and wiping a bit of blood from his chin. "Now, hurry home, take a shower, and get to U.A.! Today, you prove to the world that you belong in the hero course!"

U.A. High School was a fortress of glass and steel, an architectural marvel shaped like an enormous 'H'. 

Izuku stood before the towering front gates, wearing his black middle school uniform. His posture was different. He didn't slouch. He didn't keep his head down. He stood tall, his broad shoulders stretching the fabric of his blazer. He felt the nervous butterflies in his stomach, but they were overpowered by a deep, resonant confidence. 

He took a step forward. 

"Outta my way, Deku!"

The voice was like sandpaper on Izuku's eardrums. He stopped and turned. Katsuki Bakugo was stalking toward him, his hands shoved deep into his pockets, his red eyes glaring with a potent mixture of aggression and confusion. 

Since the sludge villain incident, Bakugo hadn't actively bullied Izuku. He had mostly ignored him, though he constantly shot him venomous, calculating looks. Bakugo had seen the monstrous claws in the alleyway. He knew Izuku had been hiding something. 

"Morning, Kacchan," Izuku said evenly, his voice calm and steady. He didn't flinch. 

Bakugo stopped, narrowing his eyes at Izuku's changed physique. He could see the thickness of Izuku's neck, the way his uniform fit tighter around his chest. 

"Don't get in my way, you damn nerd," Bakugo sneered, small explosions popping in his pockets. "I don't care what kind of freakish lizard Quirk you suddenly pulled out of your ass. You're still a pebble in my path. I'm going to ace this exam and crush you."

"I'm not aiming to be a pebble, Kacchan," Izuku replied, holding eye contact. "I'm aiming for the top. Just like you."

Bakugo scoffed, aggressively bumping his shoulder against Izuku's chest as he walked past. Izuku didn't budge an inch, standing like a brick wall. Bakugo clicked his tongue in annoyance and stormed onto the campus. 

Izuku exhaled softly, turning back toward the gates. As he took his first step, his heavy, steel-toed shoe caught on the raised concrete lip of the walkway. 

His center of gravity shifted drastically. He pitched forward, his face rocketing toward the pavement. 

Crap! My first step and I'm going to faceplant! Izuku thought. He instinctively went to trigger a Primal Shift to catch himself, perhaps a raptor tail for counterbalance, but before the green energy could spark, he stopped mid-air. 

He was floating horizontally, a few inches above the ground. 

"Are you okay?" 

A cheerful voice chimed next to his ear. Izuku looked over to see a girl with short, bobbed brown hair and large, round brown eyes. She had one hand pressed together with her fingertips touching. 

"It's my Quirk," she smiled warmly. "Sorry for using it on you without asking, but it'd be bad luck if you fell right before the exam, right?"

She pressed her fingertips together, and gravity instantly reappeared. Izuku landed deftly on his feet. 

"Th-Thank you!" Izuku stammered, his cheeks flushing slightly. Despite his physical conditioning, his social skills with girls were still severely lacking. 

"I'm super nervous, aren't you?" she beamed, pumping her fists. "Let's do our best! See ya!"

She jogged off toward the entrance auditorium, leaving Izuku standing there with a goofy smile on his face. I talked to a girl! Well, she talked to me, but still!

Inside the massive auditorium, Pro Hero Present Mic, the Voice Hero, delivered the briefing with stadium-rock concert energy. He explained the practical exam: a ten-minute urban combat simulation. Students were sorted into massive, fake city blocks and tasked with destroying "Villain Bots" worth one, two, or three points. 

Present Mic also mentioned a fourth robot—the Zero Pointer. A massive obstacle meant to be avoided. 

Izuku sat in his seat, furiously taking notes, ignoring the annoyed grumbles of a tall, blue-haired boy with glasses (Tenya Iida) who had earlier chastised him for his muttering. 

Izuku felt a strange heat building in his stomach. It wasn't the digestion of his massive breakfast. It was a dense, vibrating warmth that seemed to radiate outward into his limbs. 

Is this One For All? he thought, looking at his palms. It feels like... a coiled spring. Like standing next to a nuclear reactor.

He knew he couldn't use it. All Might had warned him that his body was a better vessel now, but using 100% of the power without any practice on how to regulate it would still shatter his bones. He had to rely on Primal Shift for this exam. 

Test Battle Center B.

Izuku stood before the massive, towering metal gates of the fake city block, dressed in a green tracksuit. Hundreds of other hopefuls stretched and mentally prepared around him. 

He closed his eyes. He didn't need to stretch his human muscles. He needed to prepare the beasts. 

Focus. Control the instinct. Be the apex.

"START!" Present Mic's voice screamed from the loudspeakers. "What's wrong? There are no countdowns in real battles! Run, run, run!"

The crowd surged forward, but Izuku was already gone. 

The moment Present Mic shouted, emerald energy exploded around Izuku's lower half. His legs lengthened, snapping into the digitigrade structure. Thick, brown scales rippled over corded, terrifying muscle. The three massive talons shattered his sneakers. 

He didn't just run; he launched himself into the city like a green missile. The acceleration was so violent it left a small crater in the concrete at the starting line. The other students gasped as they saw a blur of green and brown tear down the main avenue at over sixty miles an hour. 

"Target acquired!" a robotic voice droned. 

A One-Point robot, rolling on tank treads and brandishing mechanical arms, blocked the intersection ahead. 

Izuku didn't slow down. He channeled the green energy up his spine and into his right arm. As he sprinted, his arm expanded, the skin hardening into thick, overlapping plates of dark armor. A massive, heavy, bone-like club formed at the end of his wrist. 

Ankylosaurus Tail-Arm!

Izuku leaped into the air with his raptor legs, spinning his body to generate maximum torque. He swung the armored club arm directly into the robot's optical sensor. 

KRACK-KKOOM!

The sheer blunt-force trauma caved the robot's metal skull inward, shattering its main processing unit. The machine exploded into a shower of sparks and metal shrapnel. Izuku landed smoothly, his raptor talons gripping the asphalt, and immediately retracted the club arm to save calories. 

"One point," Izuku breathed, his predatory eyes scanning the street. 

He was a terror. For the next seven minutes, Izuku dominated Test Center B. He moved with a speed and ferocity that left the other applicants in awe. 

He rounded a corner and found three Two-Point robots cornering a student. 

Izuku dashed forward, dropping his head. Emerald light flashed across his face and upper back. His skull expanded outward, a massive, solid bone frill erupting from the back of his neck to protect his spine. Three long, deadly horns—two above his eyes, one on his snout—pierced forward. 

Triceratops Skull!

He rammed the first robot at full speed, the horns piercing its thin armor plating and short-circuiting its battery. He jerked his head violently to the side, tossing the impaled robot into the second one, crushing them both. 

He shifted his head back to normal, gasping for air as the caloric drain hit him, but immediately shifted his left hand into the scythe-claws of the Therizinosaurus to cleanly decapitate the third robot. 

"Seven points!" Izuku shouted, retracting the claws. 

He was a blur of prehistoric violence. He used the long, muscular neck of a Brachiosaurus to stretch across a gap and snatch a falling student out of the air, earning invisible rescue points. He used the powerful jaws of a Deinosuchus (a prehistoric crocodilian) on his arm to snap a Three-Pointer's weapon in half. 

He was sitting at 45 points. His body was aching, his stomach rumbling violently, and a massive migraine was blooming behind his eyes from the constant, rapid switching of genetic templates. But he was passing. He was doing it. 

"TWO MINUTES REMAINING!" Present Mic announced. 

Then, the ground began to shake. 

It started as a low rumble, vibrating up through Izuku's raptor legs. Then, the buildings on either side of the main street shattered. Glass rained down in sheets. A massive cloud of dust and debris billowed into the air, obscuring the sun. 

Through the dust, a red, glowing optical sensor the size of a minivan pierced the gloom. 

It was the Zero Pointer. 

It wasn't a robot; it was a walking skyscraper. It towered over the fake city, its massive treads crushing entire buildings into dust. The sheer scale of it induced primal, absolute terror in everyone who saw it. 

The other students screamed, turning and fleeing in the opposite direction. 

"It's huge!"

"Run away! It's a monster!"

Izuku stood frozen, his raptor legs trembling. His human brain screamed at him to run. It's worth zero points! There's no logical reason to fight it! Flee! 

He turned his body to sprint away. But as he did, he heard a sound over the grinding gears of the behemoth. 

A soft, pained groan. 

Izuku whipped his head around. Lying on the rubble, her leg pinned under a massive slab of concrete, was the nice girl with the gravity Quirk. Uraraka. She was looking up at the treads of the Zero Pointer, which were slowly, inexorably rolling toward her. 

Time stopped. 

Izuku didn't think. The logic centers of his brain shut down completely. He remembered Kacchan in the sludge. He remembered the feeling of moving before thinking. 

He planted his feet. 

He knew a partial shift wouldn't do it. A Triceratops skull would shatter against that armor. An Ankylosaurus club would bounce off. The wings of a Quetzalcoatlus couldn't lift a robot of that size. 

He needed absolute, apocalyptic power. 

Izuku looked down at his right hand. He felt the nuclear heat of One For All burning in his stomach. 

If I use 100% of One For All right now, my arm will explode. My human body can't handle it.

Izuku looked at the Zero Pointer. 

Then I won't be human when I hit it.

Izuku screamed. It was a roar that tore his vocal cords, a sound that echoed across the entire testing center, freezing the fleeing students in their tracks. 

He unleashed everything. Every single ounce of caloric energy he had stored, combined with the volatile, stockpiled power of One For All. 

He opened the genetic lock completely, ripping the door off its hinges and plunging into the deepest, darkest abyss of his primal memory. 

He sought the King. 

Tyrannosaurus Rex. 

The emerald energy didn't just flash; it erupted like a solar flare, blinding everyone in the street. The light swirled around Izuku in a violent vortex. 

His body exploded in size. His spine lengthened massively, bones cracking and shifting with deafening pops. Thick, heavily armored green scales covered his rapidly expanding form. His legs thickened into pillars of muscle designed to carry nine tons of weight. A massive, muscular tail whipped out behind him, smashing a parked car aside. 

His torso broadened, his human arms shrinking into two heavily muscled, two-fingered claws. His neck thickened, and his skull elongated, expanding into a five-foot-long weapon of mass destruction lined with fifty serrated, bone-crushing teeth, each the size of a banana. 

When the green light faded, standing in the middle of the street was a full-sized, forty-foot-long, apex-predator Tyrannosaurus Rex. 

But it wasn't just a dinosaur. 

Golden lightning—the raw, untamed manifestation of One For All—crackled violently across the T-Rex's green scales. The prehistoric beast was supercharged by the stockpiled power of generations of heroes. 

In the monitor room, the Pro Heroes watching the screens leaped out of their seats. 

"What in the world is that?!" Midnight gasped. 

"A full-body transformation of that scale?!" Ectoplasm muttered. "And the power output... it's off the charts!"

All Might gripped the edge of the console, his knuckles turning white. He's doing it! He's combining them! But can he survive the recoil?!

In the test center, the T-Rex locked its golden, slit-pupiled eyes onto the Zero Pointer. Inside the beast's mind, Izuku was fighting a desperate battle for control. The primal rage of the T-Rex wanted to indiscriminately destroy everything. Izuku focused all his willpower onto one thought: Smash the robot. Save the girl.

The T-Rex let out a roar that shook the very foundations of the fake city, the soundwave visibly distorting the air. 

With golden lightning trailing behind it, the supercharged dinosaur charged. Each footstep cracked the pavement. 

The Zero Pointer raised a massive metal fist to swat the beast away. 

Izuku didn't dodge. He channeled 100% of One For All into his massive, muscular tail and his incredibly dense skull. 

The T-Rex leaped—an impossible feat of agility powered by One For All—soaring fifty feet into the air. The beast spun horizontally. 

PRIMAL SMASH!

The T-Rex's tail, reinforced by One For All, slammed into the side of the Zero Pointer's head like a meteor. The impact generated a shockwave that shattered every remaining window in the testing center. The robot's armor buckled instantly. 

But Izuku wasn't done. Using the momentum of the tail spin, the T-Rex snapped its massive jaws forward, sinking its banana-sized, One-For-All-enhanced teeth directly into the robot's exposed neck joint. 

With a brutal, violent thrash of its neck, the T-Rex ripped the Zero Pointer's head clean off its chassis. 

The colossal machine sparked, exploded, and began to fall backward, away from Uraraka. 

The T-Rex hung suspended in the air for a fraction of a second, a god of destruction silhouetted against the sun. 

Then, the biological toll came due. 

The energy reserves hit absolute zero. The emerald light violently imploded. In mid-air, the massive dinosaur dissolved, leaving Izuku Midoriya in his human form, plummeting toward the earth. 

The pain was beyond human comprehension. 

Izuku's theory was flawed. The T-Rex form was durable, but it wasn't invulnerable. When One For All at 100% detonated upon impact, the kinetic recoil had reverberated through the dinosaur's body. When the shift ended, that kinetic recoil was instantly transferred back to Izuku's fragile human frame. 

His right arm and both of his legs shattered instantly, the bones splintering under the impossible pressure. His skin bruised a deep, horrific purple. 

Izuku couldn't even scream. He was falling, fifty feet in the air, his limbs flapping uselessly. 

I saved her, Izuku thought, his consciousness fading as the wind rushed past his ears. But I'm going to die from the fall. I have no energy left to shift.

He closed his eyes, accepting the end. 

SMACK.

Something slapped his face hard. 

Izuku opened his eyes. He wasn't falling anymore. He was floating, suspended a few feet above the pavement. 

Below him, Uraraka was standing on one leg, panting heavily, her hand outstretched. "Release!" she gasped, pressing her fingertips together. 

Izuku dropped the remaining three feet, screaming in agony as his broken legs hit the ground. Uraraka collapsed onto the rubble next to him, clutching her stomach and throwing up from the overuse of her Quirk. 

The buzzer sounded, a long, droning horn that echoed across the ruined city. 

"THE EXAM IS OVER!" Present Mic announced. 

Silence fell over Test Center B. The other applicants slowly walked back, staring in absolute, stunned silence at the headless ruin of the Zero Pointer, and then at the broken, bleeding boy who had just turned into a prehistoric monster to destroy it. 

"What... what was that?" a boy muttered. 

"He has a dinosaur Quirk? But... did you see the strength? It didn't make any sense."

"He sacrificed himself to save that girl. He's insane."

Izuku lay on the asphalt, his vision swimming, the pain in his limbs radiating in hot, white flashes. He tried to move his fingers, but they wouldn't respond. 

I got zero points from that, Izuku realized, tears welling in his eyes. I passed the written, and I got 45 villain points. But is it enough?

"Very well done, everyone. Excellent work."

A small, elderly woman in a nurse's uniform walked through the crowd. She was carrying a large syringe shaped like a walking stick. 

"Ah, the backbone of U.A.," someone whispered. "Recovery Girl!"

She walked up to Izuku, clucking her tongue as she examined his horrific injuries. "Oh my, you really went and broke yourself to pieces, didn't you? What a reckless Quirk. Or rather, a reckless use of two incredibly powerful forces."

She leaned down and kissed Izuku on the forehead. 

Izuku felt a sudden, intense drain on his already non-existent stamina, followed immediately by a strange, tingling sensation. He watched in awe as the dark purple bruises faded from his skin. The shattered bones in his arms and legs knit back together with sickening pops and cracks, completely healing in a matter of seconds. 

The extreme exhaustion forced his eyes shut. 

I did it, All Might, Izuku thought, drifting into a deep, dreamless sleep on the warm asphalt. I tamed the beast. Now... I just have to tame the power.