Hartfield

Hartfield stepped onto the Marvel stage in 2012, born from the creative partnership of Neal Adams and Christos Gage in the pages of First X-Men — a series that dug deep into the earliest, murkiest chapters of mutant history. With only a handful of appearances to their name, this is a rare, blink-and-you'll-miss-them figure from a modern story steeped in Bronze Age sensibility, sharing those charged early pages with the likes of Logan, Yeti, and Fred Duncan. For collectors who love hunting the overlooked corners of Marvel's mutant mythology, Hartfield is exactly the kind of quietly intriguing discovery that makes deep-diving into a short-run series so rewarding.