The X-Men #69

In "The Supreme Sacrifice!", the X-Men face their greatest threat yet when captured by the relentless Sentinels, forcing Professor X to confront a fallen machine to uncover its weakness. As the team fights to break free, Xavier’s desperate plan collides with the shocking actions of Dr. Trask and the terrifying power of Master Mold—leading to a moment of sacrifice that changes everything.

In a tense twist of identity and power, the X-Men face a mysterious newcomer when Calvin Rankin, a young man with the ability to mimic their powers, challenges Bobby and Hank in a shocking display of skill. After a series of encounters that lead from a diner to a hidden mine, Jean finds herself caught in a web of deception as Calvin seeks acceptance and a way to keep his abilities. With the team tracking him to his father’s forgotten machine, the true nature of his gift—and his desire—begins to unfold.