Fate/Hero BNHA x Fate/Stay Night [Male reader insert]

A Total Knockout

A/N: Yeah It's only been about a month or two... First I was out for the holidays, then I broke my hand, but now I'M back, yay! Any who, I had to rewrite this chapter because I didn't like the protagonist's quirk.

Begin!

The boy, dubbed (Y/N) by Saber, sprinted towards the abomination called Nomu, as a shimmering butcher knife was ejected from his sleeve, into his hand. The weapon left his hand as quickly as it entered, since (Y/N) sent it speeding towards the Nomu's head, which it quickly swept it's black claw up to intercept. This however left the Nomu open, something (Y/N) quickly took advantage of. 

He shot inside the creature's guard, embedding a newfound knife into it's abdomen. It let out a blood curdling screech, and (Y/N) dodged backwards just in time for a knee to be driven into the spot he had just been in with the force of a truck. The boy raised his eyebrows before resuming his assault. He jumped, delivered a kick to the creatures beak, only to have his ankle grabbed, and the teen returned to the earth with a force that made an impact crater upon his landing. 

It was so fast.. how was he supposed to keep up. The boy's blue eyes had gained a luminescent quality to them, as he rolled to the side, narrowly avoiding a flurry of punches. He sprung off of his hands to hear doors slamming open, and a deep voice call out.

"Do not fear, for I am here." A muscular blonde man, clad in a button up shirt, red tie, and tan pants. The bangs of his hair looked to be standing up in a way to make them look like rabbit ears. His voice had a stern, eerie quality to it that froze the battlefield in an instant.

[Saber]

Hearing the man's voice drove her to a halt, and as more figured swarmed in behind him, she heard the voices of many exclaiming,

"The heroes are here!"

"Finally, we're saved!"

As well as a cacophony of similar responses, most of which she couldn't quite make out. Taking the initiative, she ran to intercept these "Heroes", and see if they could help her cause. as she made her way to the heroes, a group of delinquents, most likely mixed in with the other attackers, approached her, one so audacious as to throw a punch at her. 

"How dishonorable. I suppose it is my responsibility to teach you some manners." Upon finishing her sentence, she slid to the side of his swing, and in one swift motion, dashed into his guard and drove the pommel of her blade into the man's head, and swept his legs from under him, incapacitating her assailant.

Springing up, she slashed the chest of another man who had moved in, appearing to be attempting to avenge his fallen comrade. She pivoted, just in time to parry the strike of another attacker, this time wielding a baseball bat. Putting an end to this skirmish, she jerked her sword upwards, disarming her foe, then slammed the flat of the blade into his skull hard enough to elicit a crack from him. Continuing towards the newly arrived heroes, she approached the closest to her, who happened to be a muscular man wearing a tan suit and tie, however the blazer had been removed. His most recognizable features however, were the two blonde hair strands that pointed upwards, akin to a set of horns. The man wore a firm expression as he looked to Saber, before he spoke.

" Just who might you be, young miss?" He spoke with an eerie calm, something that put her on guard.

" My name is Saber. My comrade and I had stumbled upon this battleground, and are keeping these foes at bay for the time being. Might I ask your name?" She responded, turning to him after looking to (Y/N)'s current state.

" I am All Might, a professional hero. Young Saber, you as well as the rest of the students must leave, let us heroes handle this." The man, now dubbed All Might, advised her.

" I'm afraid I can't do that, not without my comrade. If you are here to help, let's be off then." Not waiting for a response, Saber began returning to the battleground.

"Wait! Ah, it's no use. Come Heroes, let us carry out our duty!" All Might rallied the Heroes, who fanned out to the students aid.

(Y/N)

"Hoooo Boy. You're a resilient one aren't you Biggun?" (Y/N) blocked a flurry of punches from the black monster called Nomu, getting only a scream in response. 

" I suppose it's time to get serious eh?" The teen wore a smirk, a powerful pressure being released from him, kicking up a strong enough wind to blow Shigiraki, as well as some of the spectating students, off of their feet. 

A blue glowing circular glyph, comprised of many interlocking shapes and strange runes spiraled out from under (Y/N), spanning ten meters, as the wind intensified.

On the sidelines, a red haired teen with pointed teeth was barely maintaining his balance. Widening his stance, he crossed his arms in front of him to brace against the wind. Other students did likewise, trying to survive the harsh gale. 

" He's so.. strong!" The boy exclaimed, grunting as he resisted the winds.

(Y/N) pointed a finger gun at the monsters head, if you could even call it that. Making a "bang" noise, he promptly erupted into a cloud of swirling black smoke, obscuring their sight of him. Suddenly, a monstrous roar echoed through the arena, and the students quickly realized the Nomu wasn't the source of the sound. 

It was the smoke (Y/N) had vanished into. 

Clawing it's way out of the smoke, a giant, demonic monster emerged, towering over the Nomu. It had deep navy skin, and thick muscles covering it's colossal form. Resting atop it's chest was the head of a goat, with square pupils that had a blue gleam. Two black horns curled from it's head, and at it's side were two hands, each containing sharp claws. It ran to the Nomu at inhuman speeds, and the two monsters clashed in a flurry of blows, with the goat monster slashing at the Nomu with it's claws as long as knives. It met the Nomu blow for blow, each strike sending shock waves through the area. The goat monster then grabbed the Nomu, flinging it into the air, and opened it's elongated mouth. As the black creature fell, the goat monster snapped it's maw closed around the Nomu, putting an end to the fight.

"And that's a wrap!" 

To the extreme confusion, the monster dissolved, and there (Y/N) sat on the sidelines, his sword embedded into the severed head of the Nomu. He dusted himself off, standing up. 

"What.. what the hell was that?" Shigiraki exclaimed in anger, voicing the thoughts of the students and heroes alike. 

"Did you enjoy the performance, my my it was quite the show stopper." (Y/N) chuckled. 

"Just who are you?" Shigiraki asked, his face contorting into anger behind the hand that obscured it. 

" Call me Maverick, and if you ever cross me again I'll swallow you whole." A sinister grin spread across his face, as a murderous aura emanated across the area. 

"Kurogiri, get us the hell out of here." Shigiraki quickly ran into a portal of black mist, seemingly spawned by a man made of the same substance. Any remaining villains quickly followed suit.

The black haired teen turned to the mass of shocked heroes and students, hands at his hips. 

"Well, let's head out of here. I can see we all have some questions."

A/N: HELL YEAH! Finally done with this chapter. I hate fight scenes, so chapters after this might be a wee bit better, and more frequent. Sorry for vanishing off  the earth, but it's all good now. As always, I'd love to hear any ideas or feedback in the comments. Until next time!