King Serpent

A slithering menace born in the late 1990s Marvel universe, King Serpent slithered onto the scene in Captain America #9 (1997), courtesy of writers James Robinson and artist Joe Bennett. This villain moves in rarefied air — sharing pages with Steve Rogers, Nick Fury, Bucky, and Sam Wilson across appearances that stretch all the way to 2019 — which speaks to a staying power that belies a modest appearance count. Collectors hunting the Heroes Reborn era will want to track this one down as a distinctive, if elusive, piece of Marvel's modern mythology.