"It's always darkest before the dawn. The powerhouse writing trio of Ed Brisson, Matthew Rosenberg and Kelly Thompson unite to tell a blockbuster story befitting the Uncanny legacy of the X-Men -- and they do it by tearing the team apart! The world that hates and fears the Children of the Atom is more dangerous than ever: A mutant vaccine threatens their future, extinct species from the past are coming back to life and teammates are disappearing in the present. An army of super-powered Jamie Madroxes and the return of the volatile Legion complicate matters further -- and then come the Four Horsemen of Salvation! But why do they look so familiar? For whom do they ride? And do they herald a fresh apocalypse -- or a very different new age for the X-Men?" -- Back cover.
