Amazing Adventures #4

In "The Gentleman Vanishes!", the X-Men face off against the elusive mutant Vanisher, whose ability to vanish mid-teleport threatens to steal crucial U.S. military secrets. As tensions rise within the team, Iceman finds himself unsettled by the growing attention Marvel Girl gives to Cyclops, adding friction to their mission.

In "The Living Diamond!", Jack Winters takes a desperate gamble, infiltrating the Cyclotron and exposing himself to intense radiation in a bid to transform his body into solid diamond—what he hopes will make him invincible. Now calling himself the Living Diamond, he emerges with a crystalline form and a new, unstoppable purpose.