Yui reveals that the medication is experimental and designed to suppress mutant powers from awakening, but has instead become a viral mutagen. Emma follows Jun deep in the laboratory and confronts him as his true persona: Mastermind, leader of the Inner Circle, who used the U-Men as part of the plan and framed Emma for "causing" Jean's demise. The two fight, then Marsh intervenes, but the X-Men arrive and save Emma. Using an illusion of Jean, Mastermind affects Wolverine into attacking his own team, but Cyclops snaps him out of it. Emma manages to expose Mastermind. While the X-Men confront the Inner Circle members, Xavier battles an immensely strong psionic opponent in the void.