Pro Heroes, Trainees & Gigantomachia vs. All For One

Pro Heroes, Trainees & Gigantomachia vs. All For One is a battle taken place during the Final War between a group of Heroes and Gigantomachia, against All For One.

Prologue
After being nearly incinerated by Endeavor, All For One was forced to use his last resort to survive, a reverse-engineered Quirk-Destroying Drug created by Kyudai Garaki, allowing his body to Rewind back to his prime state prior to his battle with All Might. However he has two caveats to worry about, one which is that the effect of the Rewind Drug is unable to be turned off, meaning his body will keep rewinding as it gets younger, until it eventually rewinds him out of existence, though he is contempt with that resolution.

The other more troubling issue for him is being aware of the unstable fusion between his vestige self and Tomura Shigaraki, to the point that his former pupil has managed to almost completely break free of his control during his battle with Deku. In order for himself to continue to live on for his ultimate goal, he needs to reach Tomura before he disappears to ensure his success.

For his benefit, his back-up plans in the form of the other League of Villains members arrive to aid him. Spinner successfully freed Kurogiri from his containment, and proceeded to warp both Dabi and a Twice-Transformed Himiko Toga onto the battlefield in Gunga. Dabi's Blueflames and Himiko's Sad Man's Parade prove incredibly overwhelming to the Heroes on the ground, forcing them to retreat. All For One laughs at the chain of events turning in his favor, intending to use the chaos as a cover to blast over to Tomura himself.

Just before he can, however, Hawks jumps in the way, halting him with his sword before being knocked backward. Hawks sarcastically asks him why he's in such a rush to leave, even despite the time-limit on his Rewind effect, having deduced that All For One doesn't have faith in Tomura's "perfect body" and that he intends to reunite with him. All For One admits the body isn't complete and that he is still essential for the process.

Hawks calls out to Endeavor, who is busy being confronted by Dabi, telling him that since their divide-and-conquer plan failed, he has to deal with his son, leaving All For One to him. All For One attempts to lambast Hawks by reminding him of Endeavor's injuries and that he shouldn't be abandoning his duty when his job is to stop him, but Hawks smugly responds that he's already lost to Endeavor once, so now he has a different duty.

Battle
All For One continues to blast his way across the Gunga Mountains, while Hawks chases after him. He states his original intention was for Tomura to be completely usurped by his vestige self, and that melding minds with him was never part of the plan, due to his impulse for destruction eclipsing all his hopes. He explains that now that his main body has served its purpose, he just needs to inject his Quirk Factor into Tomura which will regain his complete control over it, thus completing the Demon Lord.

Hawks rushes forward toward the Villain, declaring he won't let him reach Tomura, all for the sake of their future. He swings his katana at All For One, using his Fierce Wings to attempt to feint him out, slicing at him again, but All For One is able to dodge each time. He eerily smiles that the wind seems to blow his way, and uses his Spatial Distortion Quirk, seemingly killing Hawks.

Tsukuyomi, who had been trying to fly behind and catch up to the two fighting, looks on devastatingly at the supposed death of his mentor. But suddenly, "Hawks" turns around to reveal a handsome, glittery face that simply fades away, shocking Tsukuyomi and confusing All For One. It turns out it was merely a Glamour illusion created by Illus-o-Camie, riding a Meatball finger.

The Shiketsu High School students were tasked with protecting the evacuees that were being transported between U.A. and Shiketsu, however when they didn't arrive, they believed something went wrong and arrived for backup. Shishikross used his Quirk to pull Hawks out of the way, allowing Illus-o-Camie to create her illusion, informing him of their intentions, while Gale Force uses his Whirlwind Quirk to neutralize most of the Twice Doubles overwhelming the Heroes on the ground, declaring to All For One he's the one who decides which way the wind blows.

The three Shiketsu students look on surprised to see All For One's current state. Shishikross reflects on wanting nothing more than to kill All For One to avenge his father who died during his escape from Tartarus, but backed up by Gale Force, they know that will be giving into what he wants, and that he will honor his father and set out to protect. Chewyee arrives with the rest of the Shiketsu reinforcements, informing everyone that Deku and Tomura's battle has escaped from the U.A. cage, meaning they have to ensure the battles stay in Gunga. All the Heroes proceed to multi-task their forces to subdue Himiko's Doubles while throwing every ranged attack they have at All For One. Meanwhile, Tsukuyomi flies toward Pixie-Bob informing her about his plan.

The Heroes blast their attacks all over the battlefield, with Shishikross shooting his Meatball shots and Gale Force throwing hoards of Doubles toward All For One, which he blocks and rebuffs. Naomasa Tsukauchi calls into Hawks over the comms, telling him the Shiketsu students moved in before they could even request them, and telling him to stop All For One from getting away by any means necessary.

All For One looks on at the Doubles and Meatballs being thrown at him melting away, lamenting that he can only steal a Quirk by touching the user's true body, knowing that they were aware of this and only tried to face him with just two people but have now thrown caution to the wind in their attempt to take him down. He grins about them no longer holding back, and releases multiple appendages from his back, using them to unleash a ginormous explosion of black lightning that decimates the battlefield.

Many of the Heroes are blown away by the assault, but they refuse to stay down, as many attempt to protect the others from the attacks, while continuing to throw their own attacks to keep him remaining in place. All For One monologues asking how they can believe they have a chance to stop him, being ignorant of the era when he was at the peak of his power, and how everyone trembled in fear unable to put a stop to him.

Gale Force counteracts by consuming All For One in his Whirlwind, rebutting that while they didn't know about him, they already knew about the state of the world from their history classes, and that he would rather just keep watching people like Shoto and Endeavor to see what they can do. Shishikross shoots more Meatballs into the Whirlwind, causing All For One to get irritated at them combining the ranged attacks into the whirlwind cage, deciding he should try and steal some now.

He unleashes a web of Rivet Stabs all around him, ravaging the battlefield once again and causing the Heroes to flee. One of the Rivets directly hits Gale Force, slicing the left part of his face, but despite that he continues his Whirlwind without fail, mentioning how his Quirk's even stronger on blustery days like it is currently, and reiterating his beliefs for the future. All For One can only look on annoyed at the look in their eyes, ignoring him and continuing the stoke the flames to bring back the light. He mocks them for still keeping their distance for fear of losing their Quirks, so they should just face him and accept their fate already.

But then, All For One is frozen as he senses a monstrous presence behind him in the form of a large Dark Shadow, realizing this was what spooked him the last time he was attacked by him. Taking advantage of the dark skies and windy storms, Tsukuyomi had approached Pixie-Bob to have her use her Quirk to cover him in the Earth, so that he could build up his darkness even more, and has now emerged using the Total Release technique to unleash Dark Shadow at his true power.

Deep within the heart of the giant beast that stands before All For One, Tsukuyomi declares that darkness comes in a range of shades, and that his muddied darkness he brings with him they have already devoured whole. He also reveals the reason he was brought alone to assist in the fight, knowing he couldn't steal Dark Shadow by touching the Quirk itself. Hawks appears behind Tsukuyomi to support him, and assisting by Gale Force's Whirlwind, Dark Shadow uses Black Abyss: Light of Baldur, transforming into a giant bird that completely pummels All For One down into the ground.