X-Men #21

In "Höhle des Löwen," Jean Grey finds herself pulled into the Astralebene by Onslaught, who twists Xavier’s ideals and challenges his legacy. As Jean refuses to join him, the enigmatic villain in a Magneto-inspired costume reacts with fury—setting the stage for a confrontation that tests belief, loyalty, and the very core of the X-Men’s mission. Written by Mark Waid and Reinhard Schweizer, with art by Andy Kubert and inks by Cam Smith and John Dell, this 1998 issue features dynamic visuals and a haunting cover by Kubert and Smith.