The body count rises higher than ever as the X-Men and their allies face war on every front! X-Factor comes up against their deadliest challenge yet in Apocalypse and his Horsemen, including the all-new -- and all-too-familiar -- Archangel! The New Mutants lose one of their own on an island of horrors! The X-Men take on the lethal Marauders...and the survivors will be asked to sacrifice themselves to stop the demonic Adversary! Featuring tie-ins starring...