Impure Beam

All For One took this long range Emitter Quirk from a user the series never names. It first appears in Chapter 382, though the story withholds its title until Chapter 397, and the anime introduces it in Episode 156. Tomura Shigaraki wields it as well.

The concept is blunt: an enormous, destructive beam of light, and few things in All For One's collection hit harder.

A single discharge spreads devastation across a wide area. The record backs that up. It went head to head with Light of Baldur from Fumikage Tokoyami and Dark Shadow, it ended Gigantomachia outright in one blast, and it stripped roughly two thirds of Armored All Might's shields with one connection. During his third confrontation with All Might, All For One layered it in among a scattershot mix of other Quirks.

Tomura reached for it in his last fight against Izuku Midoriya, opening with an attempt to punch through the boy's Blackwhip guard. Once All For One had reclaimed that body, he folded the beam into a Quirk combination that multiplied its output tenfold, only for Toru Hagakure to bend the shot away from its target.

Pushing it that far carries a price: at maximum, propped up by additional Quirks, the blast tears apart the user's arm or even their entire body. The Rewind Drug's regeneration let All For One shrug that off, while Tomura's rebuilt physique simply endured the recoil. The other flaw is fundamental. Light can be refracted, so any power capable of manipulating it, Invisibility included, can turn the beam aside.

All For One is the principal user, with Tomura Shigaraki as the second, and an unidentified original holder before either. Its victims and opponents include Gigantomachia, Fumikage Tokoyami and Dark Shadow, All Might, Izuku Midoriya, and Toru Hagakure, whose Invisibility redirected it.