AN: Here it is, the final chapter! Dang, the last two months have been crazy writing this story, and I thank everyone who stuck around to read it to completion! I have a couple reviews to respond to real quick, and then we'll get on with the story!

jikker jack: The sword would actually work for anyone, albeit in different ways. It contains a mix of quirks that Izuku unknowingly crystallized into it when he added his pinky finger to it. These quirks are Black Whip, Transfer, and Stockpile. The first one is self explanatory, but the second and third re-mutated into a new form of One for All within the blade. This allows the blade to be passed on, from person to person, adding to each's strength when wielding the weapon. When she had limited access to the blade, she was able to change Creation into Transmutation with the blade, which allowed for her ability to grow the blade with other materials. Once she gained full ownership, she gained the ability to retract her materials back into her body through a similar process.

My Hero Academiafan 27: Yes, Toga is Izuku's half sister. I had originally planned to have her be a bit more prevalent, but things just kinda didn't work out that way. If I do end up writing a sequel to this fic, she will almost assuredly be in it!

Izuku would have jumped for joy if he could move when he heard All Might's voice. The man came over and started to carefully break his restraints.

"I won't let you take him back, All Might, not while he still has my power!" All for One called from the television.

"It's not your power, All for One, and he's coming with me, whether you like it or not!"

"We'll see about that, boy!" As the villain spoke this, Izuku felt something start to well up in his mouth, like he was about to vomit, which was weird since he physically couldn't vomit. The liquid in his mouth poured outwards, surrounding his head before moving down to encapsulate his body.

"Midoriya!" he heard All Might call out, before the sound of rushing liquid drowned him out.

After a minute of floating in the grey liquid, Izuku fell out of its grip, and found himself face to face with the villain who was his father. Saying face to face was a bit misleading, since most of All for One's face was covered in scar tissue, with his eyes and nose missing, and only his mouth remaining to form a terrifying visage.

The scene around him was chaos. He could see some other likely villains, including the hand one and Kurogiri from the USJ attack arriving in a similar manner to how he must have, dropping out of the same grey sludge before scurrying away. The building's side and roof were gone, courtesy of the heroes that had already arrived just outside, some of whom were restraining dozens of copies of the creature that had smashed Izuku's head at that same incident.

A few feet away from him was the hero Best Jeanist, who was about to-! Not even being able to finish the sentence in his head, Izuku leapt forwards, planting himself in front of the hero with his arms spread in Black Diamond form to block the attack All for One threw at the man. Izuku skid a few steps back from the shockwave, but held firm.

"Get out of here! None of you can handle this guy, and there are citizens that need protecting!" Izuku shouted as he turned his head back towards the heroes. They had started to voice their own opinions when they saw the massive wake of destruction behind Izuku, with a clear path that was relatively undamaged directly behind him where Jeanist stood. Some chose to leave to keep the innocents safe, while others likely left to save their own skin. Only a few of the higher ranked pros chose to stay, including Jeanist and Endeavor, who started yelling about how Izuku shouldn't tell him what to do, his flaming mane blazing up towards the sky in rage. Izuku tuned him out and turned back towards All for One.

"You know, All for One, you made three mistakes today, and they will lead to your downfall." The man scoffed at him, not even bothering to charge up an attack.

"And what, pray tell, might those be?"

Izuku blasted lightning towards the man, shooting off his lasers at the same time. Neither seemed to affect him, although blocking distracted him for a moment.

"One. You brought me right to you." Izuku let loose a large blast from his palm towards the villain, creating a smokescreen between them.

"Two. You told me how my power works." Izuku's legs shifted, becoming frog like, and he crouched down, before a whip crack sounded as he leapt forwards through the smoke. Using the explosions, along with snapping with his right hand to create small shockwaves, he propelled himself forwards, twisting to land a devastating kick to All for One's face, smashing the mask he wore over it off.

All for One barely budged himself from the attack.

"And you think this will stop me? I have all the quirks I could possibly need to defeat someone as weak as you! Kinetic Booster times four, Strength Enhancer time three!" All for One's right arm swelled, the quirks he had flowing into it increasing its strength drastically.

"And three. You showed me yours. Big Fist, Kinetic Booster times four, Strength Enhancer times three." Izuku grunted as he swung his enlarged right hand upwards towards the punch All for One had thrown, the resulting kinetic blast launching the villain backwards into a concrete wall. He smashed into the wall, his right arm hanging limply from the impact with Izuku's palm.

Izuku started forwards towards him before he fell to one knee in exhaustion. Why was he so tired? It was then that Izuku looked up and realized his own mistake; he hadn't noticed that night had fallen. As he tried to stand up, solid black and red lightning slammed into him, severing his right arm and piercing into his chest, going right into the black diamond held there.

"Feeling tired, boy? I could keep fighting all night!" came the voice of the wielder of the lightning, who had pried himself from the wall and healed his own arm.

At this, Izuku heard an unfamiliar female voice from somewhere behind him, that All for One didn't seem to notice.

"Young man, if it's energy you need, then I can lend you access to my own. Kick his butt on my behalf, okay?" After the voice finished talking, Izuku felt a blast of raw power surge into him from the center of his back, and quickly stood up. His arm flew back towards him, reattaching to the stump left behind as he once more launched himself towards All for One. He slammed his right fist against his chest and swung his palm upwards, aiming to blast the villain upwards with the kinetic quirk.

All for One leaned back slightly, allowing the hand to miss by a hair's breadth. With twin ringing bells, the next two arms slammed home into his chin, sending the man flying upwards into the sky, while Izuku launched himself upwards to follow him. Izuku didn't notice as Momo arrived to the scene of the battle, unable to chase him up to that height to help.

Izuku hovered in front of All for One high above the ground, clenching his three right fists.

"Shoji's quirk really packs a punch, doesn't it?"

"Boy, I've lived for centuries, and even All Might couldn't kill me, no matter how hard he tried, why do you think you'd be able to?"

All Might had tried to kill All for One? That meant that even All Might acknowledged that would be the only way to take him down for good... in his moment of planning, All for One shot out the solid lightning once more, ripping Izuku's wings from his back, where they tumbled down towards the ground, the core from his back falling with them. Izuku felt the surging of power disconnect, but remained levitating where he was, using a form of Uraraka's quirk to remain afloat. Izuku had a plan, and he knew it'd work, but... no, he had to do this. All for One had to be taken down, at any cost.

"I can defeat you, because I'm not All Might!" Izuku yelled, pointing his left thumb towards his chest, "I'm Shard!" He used Sero's quirk to throw himself forwards, swinging around to bind All for One from behind. With four arms and two incredibly strong legs wrapped around him, along with a generous helping of extra-strong adhesives, All for One couldn't easily break out. Izuku reversed his downwards acceleration, bringing the two speeding higher into the air.

"I can survive a fall, even from this height, boy, you'll have to try harder than that!" Izuku forced the last dregs of his stamina into his form of Kirishima's hardening, his body turning black, before a second wave spread over it, becoming a solid silver; the magnesium from his thumb he had broken off into the hole in his chest had taken over, his whole body converting to the material.

"This is where I succeed where All Might failed, All for One! Hellflame, Final Attack: SHINING COMET DROP!" Izuku ignited, wreathing the two of them in blazing white flames, before closing his eyes and dropping them towards the ground thousands of feet below.

All Might was most of the way through his final leap towards the second site Nighteye had seen when he saw a shooting star crashing slowly down to earth, aimed right where he was headed towards. A few seconds before he landed, the light winked out just above the ground, and he nearly landed directly on top of Yaoyorozu due to the distraction.

"Y-Yaoyorozu?! What are you doing here? Never mind that, where is Midoriya? Where is All for One?!"

The girl choked back a sob, unable to answer, so he walked into the center of the building to investigate.

There sat a ruined mask and scattered pieces of crystal, slowly being covered by softly drifting ash.