X-Men #3/2004

In "New Worlds," Professor X makes a shocking public revelation that reshapes the world’s understanding of mutants, while grappling with the immense power of the Phoenix within Jean Grey. As the super-thief Fantomex arrives seeking sanctuary at Xavier’s, tensions rise between Cyclops and Emma Frost over their complicated past and lingering feelings for Jean.

In "Fantomex," a mysterious mercenary with a penchant for theatrics finds himself hunted through the shadows of Paris, forced to seek refuge with Jean Grey and Professor Xavier. As they help him evade his relentless pursuers, Fantomex reveals a chilling secret: Weapon XII is already deep in the city’s underbelly, tracking down the young X-Men in the sewers.

Jean and the Professor arrive with Fantomex to aid the young X-Men in their fight against Weapon XII, only to find Darkstar already fallen. As the team scrambles to regroup, Fantomex’s true identity is suddenly revealed—unmasking him as Weapon XIII.