MHA: A King's Legacy (BNHA x AOT)

The dark, narrow alleyway of Hosu reeked of blood. The dim glow of distant streetlights barely reached the scene, their flickering light casting long, ominous shadows.

Rain drizzled down, dampening the cracked pavement, washing away the crimson stains of previous battles—but not enough to hide the carnage that had unfolded here.

Izuku Midoriya panted heavily, his body screaming in protest from the brutal exchange he had just endured. His green jumpsuit was torn, streaked with dirt and blood, his muscles aching from the relentless pace of the fight. But he couldn't stop.

Not now. Not when Iida and Native's lives were on the line.

Across from him stood The Hero Killer, Stain.

His imposing form, clad in tattered rags and armor, remained eerily still. His wild, blood-red eyes gleamed from beneath his bandana, his breathing calm—steady, in complete contrast to Midoriya's heaving chest.

The long, grotesque blade in his grasp dripped with crimson, a terrifying reminder of how quickly the tide of battle could turn in his favor.

And yet, Midoriya stood his ground.

He clenched his fists, his mind racing through every lesson Gran Torino had drilled into him. Speed. Precision. Hit and move. Never be predictable.

"You're persistent," Stain muttered, flicking his blade to the side, sending droplets of blood splattering onto the cold alley walls. His voice was gravelly, laced with something that sent chills down Midoriya's spine. "But persistence alone won't save the weak."

Midoriya didn't respond. Instead, he crouched low, his muscles tensing. Electricity crackled around his limbs as he activated Full Cowling, emerald sparks dancing along his body.

Then—he moved.

With a sudden burst of speed, Midoriya darted forward, his movements unpredictable, zigzagging across the alley with short, explosive bursts.

He wasn't going to make the same mistake twice.

He reached Stain in the blink of an eye and launched a devastating right hook toward his ribs.

But Stain was faster.

With a swift, almost effortless movement, the Hero Killer twisted his torso, avoiding the punch by mere inches. His counterattack was brutal—a knee strike aimed directly at Midoriya's stomach.

He saw through me—!

Midoriya barely had time to react. He shifted his weight, using Full Cowling to boost his reflexes just enough to twist out of the way. The knee grazed his ribs, the impact sending a shockwave of pain through his body.

But he didn't stop.

Using the momentum, he spun mid-air and lashed out with a One For All-enhanced kick.

This time, he connected.

His foot smashed into Stain's forearm, forcing the villain to skid back. The impact sent tremors through Midoriya's leg, but he didn't let up. He pressed forward, fists flying, keeping Stain on the defensive.

Stain's eyes narrowed, his movements still controlled but noticeably sharper—more reactive. He's adapting to my speed, Midoriya realized.

"You're improving," Stain admitted, deflecting another punch with the flat of his blade. "But you're still too weak to change anything."

Midoriya gritted his teeth. I can't let him get my blood!

Stain was waiting for an opening. One moment of hesitation, one misstep, and it would be over.

A sudden yell tore through the air.

"RECIPRO BURST!"

A blue blur streaked into the fight.

Iida.

Midoriya barely had time to react before Iida rocketed past him, his engines roaring as he propelled himself forward with incredible speed.

The rain hissed against the heat of his thrusters, steam rising in wisps around him.

With all the force of his Recipro Burst, Iida drove his leg forward in a powerful kick aimed directly at Stain's head.

But the Hero Killer was relentless.

With inhuman reflexes, Stain ducked, the deadly kick passing just over his head. In the same motion, he spun, his knife flashing in the dim light as he slashed toward Iida's side.

Too fast—!

Midoriya reacted on instinct.

Before Stain could land the blow, Midoriya grabbed Iida's arm and yanked him backward, narrowly avoiding the blade by inches.

"You're getting in my way, kid," Stain growled.

Midoriya ignored him. He turned to Iida, eyes blazing with determination. "Can you still move?"

Iida's breath was ragged, but his expression was fierce. "My engines have overheated, but I can still fight!"

Midoriya nodded, formulating a plan in the split-second of reprieve they had. "We can't fight him one-on-one. He's too strong. But if we attack together—"

Iida cut him off. "I know. Let's do this!"

Stain exhaled sharply, gripping his blade tighter. "Fools. Your hero society is broken beyond repair. The strong should lead, not these frauds who call themselves heroes for fame and money."

Iida's eyes darkened with fury. "You're wrong!"

With renewed resolve, the two charged together.

Midoriya struck first, using Full Cowling to close the distance in an instant, feinting with his right before launching a left uppercut. Stain sidestepped—but that was exactly what they wanted.

"SMASH!"

Midoriya redirected the force of his punch downward, shattering the ground beneath Stain's feet, unbalancing him for a split second.

It was enough.

"ENGINE FULL POWER!"

Iida had been waiting.

He unleashed a devastating sidekick, striking Stain square in the ribs with everything he had. The impact sent the Hero Killer flying backward, crashing through wooden crates and slamming into a wall.

But even as the dust settled, Midoriya knew it wasn't over.

Stain slowly rose to his feet. Blood dripped from his lips, but his gaze remained as sharp and unwavering as ever. He ran his tongue over the blade, tasting his own blood before spitting it onto the ground.

"Tch. You're stronger than I expected." His lips curled into a dangerous smirk. "But you're still not strong enough."

Midoriya's stomach clenched.

Stain lifted his blade again, his aura heavier, darker than before. His entire presence seemed to distort, his intent to kill suffocating the air itself.

For the first time, Midoriya felt true fear.

And then—

A gust of wind, a cold rush of ice and a familiar voice.

"Sorry I'm late."

Shoto Todoroki stepped forward, his mismatched eyes ablaze with determination. His left hand glowed with flickering embers, his right hand coated in a thin layer of frost.

He met Stain's gaze with unwavering resolve.

"I'll take it from here."

=.=.=

=.=

=

[A few punches and kicks later]

The world was spinning.

Blood dripped from Midoriya's forehead, his body barely holding itself together. Every breath burned like fire in his lungs, every movement sent fresh waves of pain through his battered frame.

His uniform was in tatters, his arms were trembling, but his determination remained unshaken.

Before him, Iida lay motionless on the damp pavement, barely conscious, his body wracked with exhaustion. Todoroki stood nearby, his left side smoldering, his right arm covered in frost from overuse.

His breath was heavy, his usually sharp eyes unfocused from the brutal battle.

And yet—they had lost.

Stain stood tall.

The Hero Killer's body was riddled with injuries—his tattered red scarf stained darker than ever, his arms and torso covered in bruises and cuts—but he was still standing.

His grip on his blades was firm, his wild, unrelenting gaze burning with an intensity that sent chills down Midoriya's spine.

"This is… the difference," Stain muttered, rolling his shoulders, flexing his fingers as he turned his attention toward them. "Your kind—those who call themselves heroes—you are weak. You fight with borrowed ideals, shallow resolve. That is why you cannot stop me."

Midoriya gritted his teeth, forcing himself up despite the protests of his body. No. This can't be over!

"Running won't change what you've done!" he shouted, his voice hoarse but filled with resolve. "You're wrong, Stain! True heroes—real heroes—don't fight for themselves. They fight for others!"

Stain's eyes flickered toward him, and for a brief moment, his expression was unreadable. Then, a low, almost amused chuckle left his lips.

"You still don't get it, do you?" He sheathed one of his blades, reaching into his pocket to retrieve a small communication device. With a press of a button, the static-filled voice of Kurogiri crackled through.

"Stain. It's time to leave. The mission was a failure."

Stain exhaled sharply through his nose, an annoyed growl slipping out. "Tch. A failure, huh?" His gaze shifted toward the unconscious pro-hero Native, then to Iida, Todoroki, and finally, Midoriya. "No. I got what I came for. If nothing else, this night has proven one thing."

His lips curled into a sinister grin.

"This world is rotting."

He turned on his heel, stepping away.

Midoriya's breath hitched. He's leaving—!

No. He couldn't let that happen.

Ignoring the sharp pain stabbing through his ribs, he forced himself forward. His legs felt like lead, but he pushed past it.

His heart pounded against his chest, adrenaline surging through his veins.

"STOP!" he roared, lunging at Stain with everything he had left.

Stain barely glanced back. In an instant, his body moved like a blur—his knee slammed into Midoriya's stomach with brutal force.

The world spun, and before he knew it, he was skidding across the pavement, the impact knocking the breath out of him.

Midoriya coughed violently, struggling to push himself up, but his limbs refused to obey. His vision blurred.

He could barely make out Stain walking away, his ragged form disappearing into the shadows of the ruined street.

No…!

Then—light.

Stain stepped onto the main road, emerging from the narrow alleyway and into the open city streets of Hosu. Streetlights flickered above, illuminating his bloodstained figure.

And waiting for him—

A squad of pro heroes.

Endeavor stood at the forefront, his towering form wreathed in flames, his arms crossed over his massive chest. His piercing gaze locked onto Stain, unreadable yet intense.

Beside him, a handful of other pros—Gunhead, Yoroi Musha, Kamui Woods—stood ready, their battle stances firm.

And just beyond them, a small group of students from U.A.

Kirishima. Yaoyorozu. Tokoyami. Ashido.

They had all come.

Stain halted, his posture still relaxed, but his eyes gleamed with something unreadable. Slowly, he scanned the heroes before him, his expression betraying no emotion—until his gaze landed on Endeavor.

Everything changed.

The shift in Stain's demeanor was instantaneous. His muscles tensed, his breath grew sharper. His wild, unkempt hair cast deep shadows over his face, his eyes flickering with an uncontainable fury.

The air grew heavy.

A suffocating wave of killing intent exploded from his body, thick and oppressive, so powerful it was almost visible. The temperature seemed to drop despite the heat radiating from Endeavor's flames.

Everyone froze.

Gunhead's fingers twitched. Kamui Woods' breath hitched. Even the students—who had merely been observing—felt their instincts scream at them to run.

A primal, instinctual fear gripped them.

Even Endeavor stiffened, his sharp eyes narrowing as he felt the sheer weight of the aura Stain exuded.

Stain took a slow, deep breath, his body trembling—not from exhaustion, but from sheer, unadulterated rage.

"You…," he muttered, his voice barely above a whisper. Then, his lips curled into a snarl, his teeth bared like a feral beast.

"A FAKE."

His voice boomed across the empty street, shaking the very foundations of those who heard it.

"ALL OF YOU!" he roared, his voice dripping with venom, his eyes burning with madness. "FRAUDS! LEECHES! YOU WHO CALL YOURSELVES HEROES—YOU'RE NOTHING BUT PARASITES FEEDING OFF A BROKEN SYSTEM!"

A sharp intake of breath from Kamui Woods.

"The only one who has the right to kill me… the only one worthy of being called a true hero—"

His gaze shot toward the sky, as if searching for something beyond their comprehension.

"—IS ALL MIGHT!"

His voice echoed through the city, raw and unwavering.

For a brief moment, silence.

Then—his body moved.

Despite the injuries. Despite his exhaustion. Despite passing out.

His body lunged at Endeavor with blinding speed, driven purely by instinct.

"STAIN!" Kamui Woods shouted, his arms stretching out to ensnare him.

Gunhead sprang forward, ready to intercept.

But Stain was too fast.

His blade gleamed in the flickering streetlights, his bloodied form rushing toward Endeavor with terrifying precision. His expression was twisted with rage, his every movement fueled by sheer hatred.

He was going to fight until his body gave out.

Because that was who he was.

The Hero Killer.

And then—

His legs buckled.

His vision blurred.

His breath hitched.

And—he collapsed.

The moment his body hit the ground, the suffocating killing intent that had filled the air vanished.

Silence.

Stain lay motionless, his ragged breathing the only sound in the stillness. His fingers twitched slightly, as if even in unconsciousness, he refused to stay down.

Endeavor let out a slow exhale, his flames flickering lower.

The battle was over.

But as the heroes approached to restrain him, one thing was painfully clear.

Stain had won.

=---=---=---=---=---=---=---=---=---=---=---=---=---=---=---=---=---=---=---=---=

A/N: Honestly Stain is my number 2 favourite villain in MHA. Number 1 goes to Gentle Criminal. Mainly coz of his style and fashion.