Izuku and All Might stand side by side against Vill and the battle begins.

All Might: izuku, make sure he doesn't grab you, if he does then.....

Izuku: .....he'll be stronger than ever, i know that.

Vill: When I defeat both of you, i'll take the half of All for One and free tomura and his minions from those accursed police men.

Izuku: i won't let you do this!!! FULL COWL!!!! 5,000,000%!!!!!!!!!!

Izuku jump toward Vill and trys to hit him, but he keeps missing him.

Izuku(thinking): damnit!! i can't hit him, but i must buy All Might time so he can hit him with all his might!

All Might: grrr!! must.....go over...my limit and finish him off!

Vill: i won't allow that.(blasts a air-cannon)

Izuku: All Might!! look out!!!

But then, All Might was pulled away from it, it was Best Jeanist.

Izuku: Best Jeanist!! thanks for the help!!

Best Jeanist: (thumbs up)

And suddenly, all the pro heroes came to help All Might gain time and help out izuku.

Kamui Woods: kid!! you should stand back!!

All Might: NO!!!! let him! he's strong enough to take of himself!

Edgeshot: hey kid, are you sure you want to fight him? i mean, everybody in the whole entire world knows your secret and All Might's.

Izuku: don't worry, i been through tough training and i feel confident to go up against Vill.

Gran Torino: i say, let the boy fight, he has a burning passion and strength to fight.

All Might: S-sensei!!

Izuku: your All Might's teacher!! heh, why am i not suprise, let's go!!! FULL COWL!!!!! FULL POWER!!!!!!!!!!

All Might(thinking): i don't believe it! he finally learns how to control it, but he still needs to learn how to "Mastered" it.

Vill: come at me, now!!!!

Izuku and all the heroes rush toward Vill and trys to land a single hit, but none of them got a hit on him.

Vill: alright.........ENOUGH!!!!!!!!!!!!!(shoots alot of air-cannons)

All the heroes has been blown away and izuku was on the ground.

Izuku: damnit! even in my full power, i'm still no match for him!

Vill: well, i wish we can fight longer, but i kinda got bored, as for you izuku, it's time to give back what i give you.

Vill was about to grab izuku's head, but a fire blast came out of nowhere.

Endeavor: keep your hands off, villian!!

Vill: i see, endeavor has come to save you.

Izuku: what took you so long?

Endeavor: ALL MIGHT!!!!!!! WHAT'S WITH THAT FORM!?!?!?!? YOU NEED TO SHOW THE WORLD THAT YOU CAN STILL BE A HERO!!!!!!!!!!

All Might: your right! i will defeat you, Vill!!!!!

All Might transfers his remaining power of the One for All to his right arm.

Vill: that's not going to happen.

Vill aims his hand to All Might and before he shoots his air-cannon, izuku jumps next to him and punch him with all his might.

Izuku: i won't let you stop him.

All Might:(jump towards Vill) farewell, Villian. UNITED STATES OF SMASH!!!!!!!!!!!!!!!!!!!!!!

All Might(thinking): farewell, One for All.

There was silence in the air, everyone never spoke and All Might lift his fist, meaning it's all over, everyone cheered and screaming "All Might" and all the heroes feel relieved.

Izuku: nice job, All Might. you did it.

All Might: thanks to you, izuku. you help me gain time to finish him off.

Izuku and All Might chuckled a little, but.......a gust of wind blows All Might to a pile of rubble.(brutally) izuku turn around and his eyes went really wide and it was Vill.

Izuku: impossible!!! he hit you with his most powerful attack!!!!

Vill: hahahahaha!!!!!!!! i have a lot of quirks i stolen over the years and i have a quirk that i found really interesting, it's called: Illusion

Izuku steps back a little and in a Instant, Vill uses a "mid-air" quirk to get to izuku faster and grabs him.

Izuku: hey!!! let...go of me!!!

Vill: now with All Might out of the picture, no can stop what i want.(grabs izuku's head)

Izuku: NOOOOOOOOOOOOOO!!!!!!!!!!!!!!!

Everyone stares in horror and izuku's friends are witnessing izuku's power being taken away.

Class 1-A: IZUKU!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Vill: yes, yes!!! i feel it!! coming back to me! i'm feeling stronger than ever!!!!!

In izuku's eyes, he can feel himself slipping away and everything went dark.

(In izuku's mind)

Izuku: ugh....where am i? what is this place?

Izuku look around and see only black, but he started to hear a kid crying.

Izuku: huh? hey, kid. are you ok? it's going to be alright, i'm here to—no....

The kid is actually izuku when he was 4 years old.

Izuku: your.......your me!

Kid Izuku: W-w-w-w-w-who a-are you?

Izuku: i'm you, 13 years later. Why are you crying?

Kid Izuku: B-because not only bakugo bully me, *sniff* a stranger give me a horrible, terrifying, quirk, *sniff* i don't want it anymore.

Izuku: i know, i've been stuck with it for 13 years and bakugo may have bully you—uh...me, i keep my rage lock away inside me. But i feel like i want to unleash it on someone.

Kid Izuku:*sniff* what about that guy?

Izuku: wait.......your right.

Kid Izuku: hm?

Izuku: your right! i think i finally figure it out!! i need to embrace the rage within me and take out on someone and that someone is Vill!!

Kid Izuku: but....i'm scare, what if we—um...i go crazy again and kill everyone.

Izuku: no.....i can feel it, all we need to do is embrace it, okay?

Kid Izuku: O-okay, i sure hope this works, but i'm still scared.

Izuku:(opens his arms) come here.

Kid Izuku runs to izuku giving him a hug and in a moment, izuku say this before going back to reality.

Izuku: let's do this.

(back to the real world)

Vill: almost done....hehehehehehe!!!!

All Might: N-no.....izuku, i'm s-sorry...

Suddenly, izuku's hand grabs Vill's arm and the glow from Vill's hand disappear and a black aura wraps around izuku and Vill.

Vill: WHAT!?!? what are you doing!?!?

All Might: how can this be!?! wait.....could it be!?

Izuku was sucking up the All for One from Vill and after 10 seconds, he let go of him.

Vill: what!?? why can't i feel it?! i can feel the quirks i stole, but i can't feel the All for One!

Izuku stands back up and lift his head and reveals his eye color is black instead of his whole eyeball.(in this form, his voice is in a serious tone and his form is called Mastered All for One)

(MAfO)Izuku: Vill......i will not let you kill anyone!!!

Vill: this.....can't be!!

All Might: he did it....he finally did it. he turn that villian quirk into a hero quirk.

(MAfO)Izuku: alright, Vill. let's get started!!

To be continued......
next time on chapter 22: The ultimate battle(3/10) All for One finally Mastered!