This Brotherhood was assembled by Blob for mutual protection against the mutant-hunting Cerebro entity. After Cerebro was defeated by Xavier, the Brotherhood was employed by Mystique to recover the remains of X-51, the Machine Man, after which she reorganized the team. Mystique recruited some of her old teammates along with Sabretooth, Toad, Post, and Mastermind with a view to launching another assassination attempt on then-presidential candidate Senator Kelly. As Mystique, Sabretooth and Toad created a diversion by attacking the Muir Island Research Facility, Post, Blob, Avalanche, and Mastermind targeted Kelly. In response, the X-Men split into two groups to stop the Brotherhood but were unable to prevent the destruction of Muir. They would have been too late to save Kelly if not for the timely arrival of former Brotherhood member Pyro, who was in the final stages of the deadly mutant-killing Legacy Virus and sought to redeem himself before he died. Pyro sacrificed his life to incinerate Post, thus preventing Kelly's death. Despite this selfless act, Kelly was ultimately killed by an anti-mutant protester who believed him to be a race traitor. Following Mystique's imprisonment, many of the Brotherhood members were recruited by former X-Man Banshee into the paramilitary X-Corps group.
Members:
Mystique
Sabretooth
Toad
Avalanche
Blob
Pyro
Mastermind II
Post
Mimic
