Extraordinary X-Men (2015) #16

The epic conclusion of ""KINGDOMS FALL""! Magik's protégé, Sapna, has become possessed by THE WORLD-EATER, an extradimensional entity whose sole purpose is to live up to its name. And Magik's brother, Colossus, is under the thrall of one of the X-Men's greatest adversaries, APOCALYPSE. As the World-Eater bears down on Limbo, everything Magik cares about is on the line - her ward, her brother and the world's surviving mutants. What will it cost to save them all?