Jack O'Diamonds

Jack O'Diamonds is a Marvel villain who clashed with the original X-Men lineup — Cyclops, Iceman, and Beast among them — during the Silver Age. A rare deep-cut antagonist, his diamond-themed identity made him a memorable if obscure foe from that early era.

Roy Thomas and Don Heck introduced Jack O'Diamonds into the Marvel Universe in The X-Men #39 back in 1967, dropping this Silver Age creation right into the thick of one of comics' most beloved early runs. With only a handful of catalog appearances spanning a remarkable 55 years — including one collector-recognized key issue — Jack O'Diamonds is the kind of deep-cut character that rewards the dedicated Marvel archaeologist. Sharing pages with the likes of Iceman, Cyclops, and Hank McCoy puts this figure squarely in the company of X-Men royalty, and the character's preservation across Marvel Masterworks and X-Men Legends collections ensures that Silver Age enthusiasts hunting the corners of mutantkind's history will keep finding their way back here.