Over the decades, the X-Men have featured a rotating line up composed of many characters.
[1] In September 1993, to oppose the threat of the techno-organic alien Phalanx, an X-Men team quickly banded together in Uncanny X-Men #316.
[1][86] In November and December 2003, an X-Men team was formed by Cyclops in the wake of Xorn's rampage through Manhattan, New York in New X-Men #149 and #150.
The team took on missions which required responses "too violent or controversial" for the X-Men to deal with directly.
[111][112] In November 2008, Beast gathered a science team in Uncanny X-Men #504, to attempt to deal with the mutant birth crisis, and reverse the effects of M-Day.