The Formula for Villainy

Sacrificing Heroism

He never meant to attack the child. But then that child spotted him during a kill and his mentor tried to radio the agency. Now the mentor is lying on the street in a pool of his own blood, hopefully just concussed. The Hero Killer Stain may be a veteran killer but he isn't a paramedic. He doesn't always know how far he's gone. That'd explain why his last victim came up on the news as attacked but not dead, and barely surviving in hospital. But stable. That false hero should have died. It was necessary.

Iida stands before him. His legs rooted in place like tree trunks. He can't move them, can only be propelled forward by his quirk. "Good, you're here, I finally found you,"

"Why would you possibly want to find me?" Stain demands.

"So I can destroy you myself!" Iida announces, to both of their surprise. He's just so angry, and what can he do with these emotions if not get his revenge?

"Just leave," the Hero Killer orders sadly. He doesn't want to kill a child, he doesn't want to degrade himself to that. But he will if needed. "You are a child. Leave,"

"You killed my brother. You killed him for no reason!" his vengeful eyes lock onto Stain's. "I've been searching for you - that's the whole reason I'm in Hosu. I am a pro hero in training and t's my duty to take down villains like you,"

"Very well," the Hero Killer sighs, lowering into a stance. His sword brandished before him. "Prepare for death,"

Tenya shoots forward with his engines, unable to control them. He swiftly kicks the hero killer off his feet, slamming him into the ground. But leaves himself open. The blade slices through his shoulder, the unprotected part of his knightly hero costume. Tent screams, a violent scream that ululates through the city of Hosu. This pain, such exhilarating pain he's never before felt.

*

Izuku hears the shouts and appears at the mouth of the alleyway. Seething with rage, his eyes lock onto bright neon flashes from Iida's armour. His boyfriend, he underestimated him. Izuku's mouth form a cruel smile. Tenya is just as ruthless as himself. Just as bloodthirsty. If both demand blood in sacrifice for Ingenium's vengeance they can do it together as partners. Izuku does feel a little guilty. Of course he does. All Might would never endorse this, the hero world would never endorse this. But it must be done.

The burning power in his arm, pulsing through his veins. He feels One for All flowing through him, webbing patterns fo strength on his hand. He runs up, crashing his fist into Stain's face, knocking him away from Iida and into the crumbling wall.

Iida struggles from his kneeling position. "I-Izuku..." he looks up at his boyfriend, tears brimming in his eyes. Not from pain, he's just so touched Izuku is here.

"I'm gonna protect you Tenya," he promises. "And we're gonna take down this bastard together okay?!"

"Okay," Tenya smiles in affirmation, letting Izuku pull him up.

"I will have my revenge," he assures, storming over to the Hero Killer Stain.

Stain scoffs, spluttering blood. He stares at the students, overwhelmed by such a shift from their position as pro heroes in training to violent killers. "Acting upon rage and vengeance is not the way of a hero.."

"You think I don't know that?" Izuku's voice shudders with emotion. He cries tears of vitriol. "I know I'm abandoning my heroism to do this! But I'm still doing it. Because you hurt my boyfriend nd he is more important to me than anything in this world!"

Iida watches him, frozen for what to say. "I- Izuku..."

Izuku curls in on himself, concentrating the flow of his power. "One for All Cowl!" the activated power flows through him and he charges for Stain. Izuku dips through the gap in Stain's legs under the sweep of his dagger and his sword. Izuku jumps, stretching out his fist.