Psimon

Psimon stepped onto the Marvel stage in 1999, born from the creative partnership of Louise Simonson and Pascual Ferry in the pages of Warlock — a late-Modern Age series that drew together a compelling constellation of characters including Warlock, Wolfsbane, and Hope. With only a handful of catalog appearances tied tightly to that single series, Psimon is a deep-cut gem for collectors who love hunting the corners of Marvel's turn-of-the-millennium output. If you're building out a complete Warlock run, this is exactly the kind of character whose scarcity makes the search worthwhile.