Syndicate

A creature of Marvel's Ultimate Universe, Syndicate burst onto the scene in 2007 courtesy of Robert Kirkman and Salvador Larroca, navigating a world where the stakes were always life-or-death and no character was ever truly safe. With only a handful of appearances spread across Ultimate X-Men and the cataclysmic Ultimatum crossover, this is a rare, blink-and-you'll-miss-it figure whose brief existence puts them in electrifying company — sharing pages with the likes of Logan, Ororo Munroe, Bobby Drake, and Alison Blaire. Syndicate may not have had the long runway of a flagship character, but for collectors who love hunting the corners of the Ultimate Marvel tapestry, that scarcity is precisely the appeal.