Final War Arc

The twenty-second story arc of My Hero Academia and the fourth of the Final Act Saga, covering chapters 343 to 424 and Episodes 143 through 168. It follows the U.A. Traitor arc and leads into the Epilogue arc.

The decisive clash between heroes and villains arrives, with the fate of everything riding on it. All For One believes the trap closing on Izuku Midoriya belongs to him, but Yuga Aoyama and a copied Warp Gate let the heroes turn it around, splitting the enemy apart to be beaten piece by piece.

Once the Aoyama family's coercion is exposed, the heroes leave the spies in place. All For One carries Ragdoll's Search and a Lie Detector taken generations ago from a Tsukauchi ancestor, so Hitoshi Shinso brainwashes the family through every call, flattening the emotion the Quirk reads. Neito Monoma masters a copied Warp Gate in days. The bait is set in an abandoned parking lot, Search confirms two boys alone, and All For One announces himself.

Yuga plays the betrayal to the hilt and then fires a Navel Laser into his benefactor's back. Portals open that are not Kurogiri's, and the heroes pour through. The Troy system erupts from the ground, caging the villains for the three seconds it takes to shove every cage through a gate, scattering them across the country: All For One to the Gunga Mountain ruins against Endeavor and Hawks, Dabi to Kamino against Shoto Todoroki, Tomura to a flying U.A. fortress built to strip his Quirks, Himiko Toga to Okuto Island, where she snags Deku's arm and drags him along.

Each front turns on a revelation. Toya Todoroki survived as a discarded vessel and lived on nothing but his grudge; Shoto answers Dabi's Flashfire Fist with Phosphor. All For One admits his hand in Toya's disappearance, loses his mask, kills Gigantomachia, and reverses himself toward youth with a drug the doctor left behind. Edgeshot threads himself into Dynamight's ruined heart. Spinner's heteromorph army reaches Central Hospital and stops when Tentacole and Anima ask them where their anger truly belongs. Ochaco Uraraka takes a fatal wound and keeps talking until Himiko listens, then Himiko transfuses her own blood into her and dies smiling.

The origins finally surface. All For One and Yoichi Shigaraki were twins born to a dying woman whose Quirk the elder stole at birth. Yoichi learned to read from comics and wanted to be a hero; his brother read the same pages and chose to be the Demon Lord instead. Contempt drove him to murder the Luminescent Baby, who had been calling for coexistence and had gathered followers for it. He killed Yoichi two months after Kudo's resistance freed him, and spent decades chasing the power that had already slipped into someone else. Out of spite he erased Kudo's bloodline, and is enraged to find Dynamight carrying the same eyes without the blood.

All Might fights the last of it in Melissa Shield's armored suit, powered by Hercules and stocked with tricks borrowed from Class 1-A, until the suit dies and Stain buys him a moment with his own blood and pays for it with his life. Dynamight, resuscitated by a stray spark of his own sweat, defies the vestige hardening inside One For All and reaches All Might in time. He then breaks All For One's final gambit, and the vestiges of every stolen Quirk turn on their owner as he weeps, shrinks, and passes out of existence altogether.

Gentle and La Brava keep the fortress in the air, Lady Nagant fires from a hospital roof, and the Business Course broadcasts the whole thing to a watching world. Tomura reclaims his own body from All For One's control, declares his intent to destroy Japan as payment for the household that made him, and steals Danger Sense straight out of the vestige realm. The fight runs to Mount Fuji, where he promises a chain of ruin nothing can stop, and Deku stands his ground on the only argument he has ever had, that a person remains inside Tomura yet.