The epic story that ushered in the Age of Apocalypse! Legion's once-shattered psyche is finally united, with a singular purpose - to make up for all the misery he has visited on his father, Charles Xavier. And to do it, he plans to make Xavier's dream a reality - by travelling back in time to kill its greatest obstacle, Magneto! The X-Men scramble to stop him from altering history - but, lost in the past, can they thwart Legion's misguided mission before the entire Marvel Universe is wiped away? Plus: Mystique seeks revenge against Legion, even as her shocking connection to Nightcrawler is revealed! And Storm returns to Cairo to face her past... but will she join the all-new Hellfire Club? Collecting: Uncanny X-Men (1981) 318-321, X-Men (1991) 38-41, X-Men Unlimited (1993) 4-7, X-Men Annual (1992) 3, X-Factor (1986) 107-109, Cable (1993) 20