The Scarlet Witch has changed the universe, but Saturnyne's come to destroy it! The House of M is spilling into the multiverse like dominos and may topple it like cards, especially if omnipotent evildoers Mad Jim and madder Jamie have their way! Captain Britain and his family have two days to save the world as they know it - if only they can remember it! Heroes and villains will die, but which are which? Plus: If Magneto rules the world, where are Doctor Doom and the Green Goblin, to say nothing of their archenemies? The answers surprised the world! Guest-starring the Black Panther, the Thunderbolts, and more, this title features the pre-formation of New Excalibur! It collects "Spider-Man: House of M" numbered 1-5, "New Thunderbolts" numbered 11, "Fantastic Four: House of M" numbered 1-3, "Black Panther" numbered 7, and "Uncanny X-Men" numbered 462-465.