Ultimate X-Men Volume 4: Hellfire & Brimstone

Upon returning to Westchester after many deaths and hard decisions, the X-Men must continue and make an attempt to regain their normalcy and open their school once again. However, the bizarre has become the norm as Jean Grey's life takes an unexpected and dramatic turn for the strange as she begins experiencing astounding visions of a colossal bird engulfed in fire. Do the X-Men have what it takes to bring down their own teammate for the sake of the greater good?

Collecting Ultimate X-Men Issues #21-25