Doctor Neutron

Born from the creative firepower of Walter Simonson, Louise Simonson, Jon J. Muth, and Kent Williams, Doctor Neutron stepped onto the page in 1988's Havok & Wolverine: Meltdown #1 — one of Marvel's most visually distinctive Copper Age prestige-format series. This is a character who keeps genuinely dangerous company, sharing the story with the likes of Logan, Alex Summers, and the ominously named General Meltdown. With only a handful of appearances concentrated entirely within that celebrated limited series, Doctor Neutron is a rare, atmospheric figure — the kind of villain whose scarcity makes every page count.