Son of M is a 2006 American comic book limited series, a follow-up to Marvel Comics' 2005 "House of M" storyline, starring the depowered Quicksilver. Quicksilver was one of the many mutants to lose his powers as part of the Decimation, for which he was partially responsible. Background Following his sister's nervous breakdown, Pietro convinced Wanda that she could undo her wrongs by using her powers to turn the world into a world of peace. Wanda warped reality into the House of M, a world where mutants were the majority, humans the minority, and Magneto was the ruler. During a battle between Magneto's forces and heroes having regained their memories, a mutant named Layla Miller was able to restore Magneto's memories of the original reality. Enraged, Magneto confronted Pietro, angry that he had done all of this in his name. Pietro said he believed his father would have let Wanda be killed by the other heroes, that he was protecting her, but Magneto replied Pietro had only used Wanda and himself. Furious, Magneto killed Pietro. Wanda revived her brother and declared "No more mutants", changing the world back to its original form and causing approximately ninety percent of the mutant population to lose their powers, leaving the mutant race on the brink of extinction. Pietro was among those affected, resulting in his falling into depression, both because of his loss of power and over his betrayal of mutantkind. Synopsis Pietro struggles to deal with life as an ordinary human, and desperately uses a beacon to attempt to contact the Inhumans. An attempt to stop an anti-mutant gang killing a mutant with an organism growing on his stomach goes badly, until Spider-Man intervenes, after which he confronts Pietro (angry with the fact that he still has memories of being married to Gwen Stacy and having a child together from the House of M reality), which leads to Pietro jumping off a roof, seriously injuring himself. Crystal, who Pietro had tried to contact earlier, teleports in with Lockjaw, to find her ex-husband lying hurt, and blames Spider-Man. Pietro wakes and interrupts Spider-Man's attempted explanation to tell Crystal that he had jumped off the roof. Crystal teleports him to the Inhumans' home for medical attention, believing he had become suicidal upon the loss of his powers and unaware of his true connection to the events. After treatment by an Inhuman healer, Pietro is