Professor X rebuilt the X-Mansion and the X-Men, with the team larger than ever before now moved back to their former home. To remain effective as a group, the X-Men were divided into two squads: Blue, led by Cyclops, consisting of Beast, Wolverine, Rogue, Psylocke, and Gambit; and Gold, led by Storm, consisting of Jean Grey, Iceman, Archangel, and Colossus. Following the return of Magneto's activities, S.H.I.E.L.D. requested the X-Men to investigate. The Blue Squad battled Magneto and his new team, the Acolytes, in Genosha. Discovering Moira had altered his DNA years ago, Magneto questioned if his recent turn to heroics was a result of Moira's tampering or his own free will was. He then forced Moira to brainwash the X-Men Blue Squad into joining his Acolytes on Asteroid M, a space station that served as a haven for mutants. To make matters worse, the American and Russian governments decided to use a plasma cannon on the space station to end the threat of Magneto once and for all. Worried about their friends, the Gold Squad sneaked on board and rescued their teammates, while a traitorous Fabian Cortez abandoned Asteroid M and planned to sacrifice Magneto as a martyr, so mutants around the world would join him. Xavier tried to talk the Acolytes into escaping the doomed base with the X-Men, but Magneto and his followers chose to stay and die instead.