The World Tour Is Over.
It ended abruptly and tragicaly, with deaths and hard decisions. After returning home to Westchester, the X-Men carry on, seeking a return to  normalcy and opening their school to students once more. But amid the mundane, Jean Grey's life takes a sudden turn toward the bizarre. Her mental barriers begin to erode as she starts to experience strange visions... like a giant bird composed entirely of flames. To save themselves - and the world - will the X-Men be forced to strike down their own teammate?
Collecting Ultimate X-Men #21-25 - written by Mark Millar, and illustrated by Adam Kubert and Kaare Andrews.