Uncanny X-Men #175

« Phoenix! »: The X-Men are stunned to see the Phoenix firebird over the mansion as Cyclops falls from the sky, warning them that Dark Phoenix has returned before she bursts from his possessed form and overpowers the team. Word soon arrives that she has destroyed the Starjammer and all of New York. Recovering from an out-of-body vision, Cyclops realizes the true culprit behind events, but is attacked by his own teammates, who mistake him for the villain. Using the Danger Room to subdue them, he has Rogue absorb Professor X’s power to see through the illusion, revealing Mastermind as the true manipulator. Storm finally brings him down with a tempest — and Cyclops quietly visits Phoenix’s grave before marrying Madelyne. Key issue: Dark Phoenix revealed as Mastermind’s illusion; first appearance of Philip and Deborah Summers.