Chapter 346

Mirko, Edgeshot, Nejire Chan, Suneater, and Great Explosion Murder God Dynamight touch down on the airborne U.A. fortress. Best Jeanist wants to know where Deku went, and the answer is that something dragged him off. Suneater and Nejire push to warn the others, while Mirko only wants a crack at the deadliest villain in history.

Realizing he is the sole arrival and that the ground beneath him is flying, Tomura tells the other voice in his skull not to seize control this time, then Decays the floor to hurl a shockwave at the heroes. Instead of a wave, slabs of metal punch upward and fling him into the electromagnetic barrier overhead. The current freezes him just long enough that Best Jeanist can snare him in carbon fiber and hurl him back down.

Superhuman or not, Jeanist explains, a strong enough charge stiffens the body for a moment, and a moment is enough. Tearing loose, Tomura understands what happened: the decayed ground was launched skyward to crumble harmlessly in the air. He jeers that the terrain will run out eventually, and Jeanist tells him material is the one thing they have to spare as fresh blocks rise out of the gaps. The arena, he says, was built for one purpose. It is a coffin in the sky.

Below the surface, Mei Hatsume, Cementoss, Power Loader, and the Development Class work without pause to rebuild every shattered piece, with Creati manufacturing replacement stock. Jeanist credits the design to study of the villain's two previous major fights, where his lethality and his prime All Might speed were both catalogued. The flying arena was Mei's idea, adapting the evacuation and anti-Decay systems Nezu had already installed, then carving the ground into small blocks with drone-like behavior. Comicman, Chargebolt, and the rest of U.A.'s electricity users supply the current for the systems and the barrier, those two loaded up specially for the job.

Jeanist declares this is not about honor or glory. They came to protect the days ahead and to end his ruin. Tomura winds up another shockwave and Dynamight mockingly reminds him how Jaku went. The Quirk is dead, and Tomura spots the reason on the generator: Phantom Thief, flanked by Eraser Head and Manual, erasing him all over again. Eraser Head notes that staying at Phantom Thief's side lets them work around the five minute Copy limit, though the plan also depended on One For All, and Deku is missing. Then Tomura's left hand swells into a writhing mass of fingers. Dynamight cannot explain it to Mirko, and Eraser Head realizes with dread that the body is nearly finished this time. The fingers lash toward Mirko while their owner mocks Eraser Head as a letdown.

Best Jeanist, Mirko, Edgeshot, Nejire Chan, Suneater, and Dynamight commit to fighting Tomura Shigaraki without Deku on the field.

The floating fortress is revealed to break apart into individual segments as a counter to Decay, ringed by an electromagnetic barrier that keeps Tomura from escaping. Mei Hatsume, Cementoss, Power Loader, and the Development Course rebuild the broken sections, Creati supplies extra material, and the school's electricity users, Comicman and Chargebolt among them, power the whole apparatus.

Phantom Thief, guided by Eraser Head and supported by Manual, Copies Erasure and shuts Tomura's Quirks down again.

Tomura's left hand erupts into a monstrous glob of fingers, which he sends at the heroes.

Kohei Horikoshi titled this chapter Super Hyper Unfair Broken Stage, romanized as Sūpā Haipā Kuso Hame Sutēji. Fifteen pages, published March 7, 2022 in issue 14, collected into volume 35, and adapted as part of Episode 144.

The cover assembles Best Jeanist, Mirko, Edgeshot, Nejire Chan, Suneater, and Great Explosion Murder God Dynamight.

Horikoshi's author comment thanks Inagaki Sensei and Boichi Sensei, saying he is constantly in a state of excitement.