Mask was grateful for the sudden appearance of the muscular blonde hero wearing a primarily blue outfit with small sections of red, white, and yellow. Confident as he was that he could handle the villains the fact was that his energy reserves had only recovered to 45%. He did wonder as to how the heroes had zeroed in on the villains hideout but that was a thought for another time.
Kurogiri was raising his hands to warp the villains out of there when something shot through the air from the direction of the door. As Kurogiri slumped down, a hero was unfolding himself from underneath the doorframe. He looked a bit like a typical ninja but with rather crazy hair.
A third hero leaped in through the hole that the first had created, arms outstretched as strong wooden vines shot out to pin the various villains in place. Mask wasn't exempt from the vines attack either which quickly pinned him against the wall. Honestly it was to be expected since it wasn't like the heroes had gotten a good look at him. Well these heroes. Still they could have at least done some level of recon. In his mind Alana snorted and started to play a video, set to the Benny Hill theme, of Mask doing no recon and charging head first into danger repeatedly. Mentally Mask rolled his eyes at the snarky A.I.
"Villains! We have come to rescue the hero that you captured! Now where is he?" All Might shouted as he stepped forward. The eyes of all the villains shot in one direction before widening in surprise. All Might followed their eyes blinking as he took in the scene.
Mask was casually brushing wood chips off of his body even as the brick wall behind him crumbled a bit more. At his side All Might could feel Kamui Wood stiffen in shock. Edgeshot the closest to the man jumping in surprise, he hadn't even seen the man move.
"Sorry about that Heroes, my automated defense systems kicked in when I got attacked. I'm the one you are looking for by the way. Iron Mask can be considered my alias or Mask for short."
"And your automated defense systems are?" All Might questions even as a brick that had been valiantly trying to remain in place loses its fight to gravity and tumbled to the floor.
"Dismantling field." Mask responds as if that answered all questions. It didn't.
"That's it this wood won't hold.." Dabi shouted, blue flames gathering in his hands before a yellow blur crashed into his face, knocking him out. The yellow blur resolving itself into an elderly man with a wooden cane. "None of that now youngster."
"That was going to end badly for all of us if Dabi had been able to get that off." The heroes all turned in Mask's direction slightly confused at his comment. Inclining his head Mask gestures with his chin towards the bar. Everyone even the villains eyes follow his gesture before they all go pale. Dozens of bottles had been crushed in the opening seconds of the fight. Alcohol dripping down into a slowly growing puddle that already covered nearly half of the floor.
"No use, then. We're not the only ones you gotta worry about. Kurogiri! Bring 'em all over to play!" There was a pregnant pause as the heroes stiffened in alarm. But after several seconds of nothing happening they relaxed once more.
"I'm sorry Shigaraki-San, but the Nomu set aside for us, they're gone!"
"Looks like you've still got a lot to learn Shigaraki! Your little league has gone and taken some things too lightly. Like the police and their relentless pursuit of justice. As well as our rage! Your mischief's gone on long enough. It ends here, Tomura Shigaraki!" Standing slightly off to the side Mask observed the entire scene, Alana playing I've no more fucks to give. It was wildly inappropriate for the scene as a whole but considering how this song and dance usually went. Casually he released a cloud of nanites that spread throughout the room and into the air outside. Using them to get an idea of the nearby area.
Wow that was a hefty police response out there, with quite a few heroes mixed in. One even radiated heat like a furnace and had an impressive flaming beard. As a tracking nanite settles down somewhere on each person Mask idly wondered if flaming beard man and Dabi are related. Probably this was a dimension where things like that happened all the time. Oh Shigaraki was wrapping up his spiel against everything and everyone, time to start paying attention again. Arcs of electricity jumping between Mask's hands as he moved them closer together in preparation. The hero Edgeshot and several of the police that had rushed in with him edging away from Mask. Even as the gave him concerned glances.
Dozens of Nomu suddenly burst out of black gooey portals all over the area in which Mask had spread his Nanites. Nomu that were in motion immediately even as the captured villains seemed to vomit up similar black goo and vanish. Mask ignored the villains escape as a crackling bolt of lightning leaped from his hands and began to arc through the Nomu. In seconds every single monster that had warped into the area slumped to the ground dead. Each one sporting a smoking hole directly between the eyes.
All Might gazed down at the Nomu that was dead at his feet, out of the corner of his eye he can see Gran Torino nudging one of the beasts with his stick. The number one hero of Japan was also aware of the stunned silence from outside. Stiffly he turned his head towards Mask, his usual sunny smile feeling a bit forced. He had of course heard about what Mask had done in the forest but this was quite a bit more impressive. "What did you do?" He asks quietly. Mask paused beside All Might, red visor peering down at the police cars scattered below.
"I dealt with the threat." And before All Might could respond Mask had jumped out the hole, falling the twenty or so feet to the ground below. A burst of blue energy slowing his descent before he hit the ground.
It doesn't take long for All Might to catch up to Mask, finding the green cloaked man having the police move several cars to create some kind of open area. Endeavor staring at Mask as if he isn't quite sure how to react to the other figures presence. "That was a very reckless thing that you did, you could have seriously hurt someone discharging such a powerful electrical attack like that without warning."
"Perhaps but I trust my aim and it was the fastest way to deal with the problem." Mask replied even as he stepped out into the open area that the police had created. All Might turning to glance at Endeavor as the number two hero snorts.
"Maybe but still you shouldn't have.."
"Do you want to save the other heroes or not?" Mask interrupts whirling around to face All Might.
"What?"
"Think about it if the Nomu were able to be warped into this area for an attempted ambush then it is likely that a similar situation is currently happening at the other site. Now if you and Mr Flamey Beard could step back I need to do an emergency recharge." All Might is stepping back before he even realizes it, Endeavor at his side bristling angrily. What Mask had said made sense so for the moment he let's the issue drop, worried for the safety of the other heroes. He should be rushing to their aid but curiosity seems to have him rooted to the spot for the moment
Mask strode out into the center of the cleared area and lifting his right hand above his head. Between Mask's fingers All Might could see a glowing red sphere. The boom of thunder causes him to look up into a sky that was suddenly swirling with dark thunder clouds, the hair all across his body standing on end. Time seems to freeze for a moment before a massive bolt of lightning streaks down from and strikes the ground directly in front of Mask.
It took All Might several seconds of blinking before his eyes had recovered enough to be able to see again. Of course once they did clear he wasn't sure that his eyes hadn't suffered from some kind of permanent damage. Mask was rubbing the head of a massive horse with a single sharp horn in the shape of a lightning bolt on its brow, the horses long white mane was braided into several strands. Despite how tall Mask was he only came up to the shoulder of this massive horse which occasionally released sparks of lightning that flowed into Mask.
"What uh is this creature?" Once more All Might found himself baffled by the powers that this mysterious man wielded.
"It's a summon that I have access to, his name is Ixion the Lord of Lightning. I can absorb the lightning that comes off of him to restore my reserves in emergencies." Even as All Might watched the horse snorted and stamped a hoof against the ground, lightning leaping up to be absorbed into Mask.
"You and Flamey Beard should get going to the other site, I'll catch up in a couple of minutes." All Might couldn't help glancing over at Endeavor as the other hero bristled angrily. It took the pair of them a couple of moments to get organized before they took off towards the warehouse that had been identified as another hideout of the League.
Eventually Ixion faded away as the magic binding it to the world ran out. Silently Mask thanked it before rising into the air, electricity crackling around his limbs. The nearby police and other heroes watching in slight awe as Mask seemed to transform into a bolt of lightning that streaked across the sky.
It took almost no time at all to cross the 5 kilometers that separated the two hideouts that the villains had been using. Mask hovering over the battle that was already in full swing by the time that he had arrived. The muscular blonde and flamey beard were battling a tall man in a black suit, whose head was covered by a face concealing helmet.
There wasn't a sign of the rest of the League to be seen and a quick check of the trackers revealed that they had been transported somewhere else. As Mask started to drift down towards the battle he spotted Izuku, Bakugo, Momo, Shoto, a guy with exhaust pipes attached to his legs, and a guy with black hair and a yellow lightning bolt colored streak, departing from the battlefield at full speed.
As Mask's feet crunched down onto the ruined ground the three combatants turned to gaze at him. The blonde nodded and flamey beard scowled at Mask, whose focus at the moment was on the figure in the suit. "Your the one that young Tomura was trying to recruit to his side, if I recall you were also the one that defeated my Nomu in the forest." Rather than responding verbally Mask inclined his head in agreement.
"It seems that since you are here that he was unable to convince you to join him. I would like you to reconsider your current path and work with my disciple."
"Don't listen to him Mask! All for One is nothing but pure evil who desires complete domination of the world."
"Now All Might that just isn't fair. The world underneath me will be a much better place and all people have to do is bow their knee to me."
"As I already told your disciple no, I've done that song and dance before and seen how it ends." When Mask responded there was a slight growl to his voice as if he was recalling something unpleasant.
"Pity, I suppose I'll just take your quirk then!" All for One shouted as he shot forward towards Mask. As he did so he extended his hands to either side blasting All Might and Endeavor to keep them from interfering. Raising one hand up Mask launched a bolt of lightning that went soaring past AFO as he dodged. Mask didn't get a chance to fire a second shot before the other man was upon him. The tendrils of his quirk plunging into Mask to extract his quirk, digging deeper and deeper only to find, nothing.
"Sorry but what your looking for isn't there." Then rearing his fist back Mask punched AFO in the head as hard as he could. Metal crumpled under the impact as AFO was sent flying away, bouncing once before he could steady himself. "Endeavor stay back! He might try to steal your quirk!" All Might shouted as he rushed forward punching at AFO who raised a hand to block it before blasting him back with a burst of air. Mask taking note of flamey beards apparent name actually was.
Since his back was presently turned away from Endeavor the number 2 hero in Japan took the opportunity to unleash a torrent of fire at AFO's back. A burst of wind divided the fire in half to Endeavor's surprise, AFO rushing through the opening towards him. He was forced to abort his charge however as a bolt of lightning zipped in front of him. Mask charging in behind the bolt, blades sprouting from above each wrist, so that he was positioned between AFO and Endeavor.
All Might's charge back into the fray was met with AFO blocking the punch with one hand before grabbing onto All Might's arm and using him as a projectile throwing him towards Mask and Endeavor. Mask's blades transforming back into his bracers as he arrested All Might's flight. All Might giving Mask a nod of thanks as he stood up before buckling at the waist and coughing up a mouthful of blood.
"Running out of time already All Might or is the wound I gave you all those years ago causing problems?" Smoke poured off of All Might as AFO taunted him, Mask suddenly finding himself supporting a skeletonly thin man with blonde hair. The sound of helicopters drawing Mask's attention briefly away from All Might and a glance up into the sky reveals several camera crews filming the ongoing battle. "Alana prepare a flash bang pulse, radius 10 meters to fire on my mark."
"Preparing pulse." Alana replied in Mask's head. Even as he turned his attention to All Might. "How much you got left?" Pushing himself up All Might clenched and unclenched his fist a couple of times before responding. "I've got one last shot in me. I can defeat him." Mask nodded in response, taking a slight step back.
"You defeat him and I'll end him." Endeavor and All Might stiffened slightly at Mask's words pitched low enough that AFO wouldn't be able to hear him. At first All Might seemed like he was going to object before lowering his head and nodding, eyes dark. "As much as I want him in jail I won't argue with you if you want to end his threat for good. I just want to know, are you prepared for what taking a human life will do to you?"
"I'm prepared, that man before us can't be considered human any longer. He's long ago left that behind, all that's left is a monster." All Might didn't respond instead taking a step forward followed by another, and another. Until he was running towards AFO, one arm powered up. AFO scoffed even as his right arm bulged in size, some kind of black spikes pushing out from beneath the skin.
All Might and AFO exchanged a single set of blows before All Might's other arm increased in size and he shouted. "United States of Smash!" Before punching AFO so hard in the face that his mask shattered completely.
"Now." Mask spoke to Alana, a blinding white light flashing out around the battlefield that also disrupted the cameras filming. Mask's body converting into electricity as he zipped across the battlefield.
Still reeling from the blow that AFO didn't think all might had left in him the villain pushed himself to his feet. He wouldn't be defeated, not like this. He had one last trick to play. Suddenly the quirk that allowed him to see the world around him alerted him to the appearance of that quirkless robot appearing behind him. He tried to turn, to lash out and defend himself with any of the numerous quirks at his disposal. But he wasn't fast enough.
Slowly Mask pulled the dimly glowing black blade out of AFO's lifeless body. The blade not leaving a single mark from its passage. Mask hadn't released the flash bang because he was worried about what people would think of him killing a villain. He had done it so that this world wouldn't see the blade that he had used to do it. A blade that shouldn't exist, the ultimate magic given form. Something that others shouldn't know existed. Mask converted into electricity and zipped back to where he had been standing before the light had even started to fade. AFO's body disintegrating until all that remained was a bit of black sand which was soon lost among the rest of the debris.
All for One was dead, one horrible future buried in the avalanche of change that this single pebble had already caused.