Collects Uncanny X-Men (1963) #515-522, Dark Reign: The List - X-Men #1 and Nation X #1-4.
Welcome to Utopia! After their all-out war with Norman Osborn and his Dark Avengers, the X-Men have left their home in San Francisco and relocated to a rocky island raised from the ocean floor. Now, with morale crumbling and outside threats growing, Cyclops struggles to create a safe haven for the dwindling mutant race. The situation gets even more difficult for the X-Men with the arrival of one of their most dangerous foes: Magneto. Though the Master of Magnetism claims he comes in peace, his true intentions remain to be seen as the last remnants of mutantkind prepare to meet an even greater threat as it rockets toward their new home.