Glow Worm

Debuting in 1986's Marvel Age Annual #2 under the hands of the legendary Roger Stern and John Buscema, Glow Worm is a compact but collector-notable presence in Marvel's Copper Age landscape. With a quarter-century publication footprint and two key-issue appearances to their name, this character punches above their modest appearance count. Their pages are graced by some remarkable company — Warlock, Spider-Woman, Bobby Drake, and Scott Summers among them — and their strongest showings are tied to the Evolutionary War saga and the New Mutants Annual, placing them squarely in one of Marvel's most ambitious late-'80s crossover events. Four appearances, two of them significant to collectors: sometimes rarity is its own kind of distinction.