My Hero Academia Season 6 Episode 12 and 13, “Threads of Hope,” and “Final Performance,” Mr. Compress makes a shocking sacrifice to give Tomura a chance to flee. Best Jeanist is struggling to maintain control of all the villains. He uses his Ultimate Move: Blackout Bind, chocking the members of the League knocking them unconscious. Mr. Compress tells Spinner that he’s going to “buy them some time.” Using his own compression Quirk, Mr. Compress gouges out flesh from his own butt. It works and frees his arm enough to escape and compress Tomura and Spinner.

Mr. Compress sacrifices himself

As Best Jeanist tries to recapture Mr. Compress, the villains continues to use his Quirk against his own body and eventually removes his own clothing. This prevents Best Jeanist from binding the fibers of his clothing. He recalls a famous criminal from the past, Oji Harima, a peerless thief. Harima was Mr. Compress’s great-great-grandfather. Oji’s main goal was to steal from heroes the profited from the hero system, a robin hood type character. Mr. Compress was told that their family “is all about exposing injustice.” Elsewhere, Dabi gives up on fighting Shoto as Endeavor passed out. Mr. Compress uses his Quirk to compress Dabi. Claiming that he’s now passed on Oji’s will to Tomura,

Mr. Compress removes his mask. Announcing that he’s going to perform, “first and final escape artist performance of Mr. Compress,” he releases Tomura and Spinner, with the later waking up Tomura. Awaken, it turns out All For One, has taken over Tomura’s body. The remaining heroes try fruitlessly to stop Tomura, but are too badly injured to stop All For One. As the villain escapes we see the carnage he left behind. Heroes unconscious and some suggested dead, the destruction from Tomura’s decay and Gigantomachia’s rampage. The heroes have managed to save many but failed to stop Tomura and All For One.