Black Mace

A mysterious figure who stepped out of DC's reference pages and into the broader universe, Black Mace made their debut in Who's Who: Update '87 — that beloved Copper Age encyclopedia of the DC cosmos — courtesy of creator Bob Greenberger. With appearances stretching across Adventure Comics and nearly a quarter-century of DC history, this character keeps genuinely rarefied company, sharing pages with legends like Green Lantern, The Flash, and the Legion's own Cosmic Boy and Rokk Krinn. Rare in the catalog but intriguing for exactly that reason, Black Mace is the kind of deep-cut discovery that reminds devoted collectors just how vast and rewarding the DC universe truly is.