Collects Ultimate X-Men #89-97. It’s dark times for the X-Men as the evolutionary emperor known as Apocalypse arrives! Will even the X-Men be enough to battle a being who has plotted our death and destruction for ages?! Meanwhile, two more monstrous threats – who look eerily like Stryfe and Onslaught – rear their ugly heads to ensure the young mutants’ downfall! Then, after the devastating battle against Apocalypse, the X-Men encounter a new adversary that seems unstoppable. To fight it, the young mutants must ask themselves: How far are they willing to go, and what are they willing to take to raise their game? The answer will test their bonds and shake the team to its very core.