Read X-Men: Dark Mirror Storyline:
SUMMARY:Feared and mistrusted by the very people they have sworn to protect, the X-Men are a band of mutant heroes dedicated to defending humans from those mutants who would use their powers to harm and destroy. Blessed -- some would say cursed -- with awesome abilities, the members of the X-Men are Earth's last defense against villains and madmen...and the future's only hope.Jean Grey awakens in an unfamiliar room. She is weak, disoriented, stripped of her telepathic and telekinetic powers -- and trapped in someone else's body. Also prisoner are her teammates Cyclops, Wolverine, Rogue, and Nightcrawler -- their minds held hostage within the bodies of strangers. Who has brought them here, and for what purpose? The answers lead to a terrifying plan that threatens not only the X-Men, but all of mutantkind...Pages of X-Men: Dark Mirror :