The central tragedy unfolds at Alkali Lake. Wolverine and Storm escort a grieving Cyclops to the site where Jean Grey supposedly died in X2 . Cyclops, still hearing Jean’s psychic echo, follows it into a crystalline cavern. There, he finds her — naked, alive, but utterly changed. The psychic “walls” Xavier built have crumbled. The rage and power of the Phoenix, a primordial alter ego Jean suppressed her whole life, has broken free.

Meanwhile, on the other side of the bridge, Magneto sees the cure as a declaration of war. He rallies a brotherhood of angry, disenfranchised mutants at his forest encampment, declaring, “They have built a weapon to destroy us. We will not go quietly.”

With tears in his eyes, he drives his claws into her heart. Jean Grey smiles, thanks him, and dies in his arms. The Phoenix is extinguished.

The news tears the mutant world apart. At Professor Xavier’s school, students debate the ethics of a cure. Some, like Rogue, see it as salvation from a life of isolation (her lethal touch prevents physical intimacy). Others, like Storm, see it as cultural genocide.