Asp

Cleopatra 'Cleo' Nefertiti is a mutant who can generate and project bioelectric 'venom bolts' from her hands, capable of paralyzing or killing targets. She became one of the founding members of the Serpent Society, a professional mercenary guild of snake-themed villains.

Few characters can claim a Bronze Age debut with staying power that stretches across four full decades, but Asp has done exactly that — arriving in 1985 courtesy of a creative team that included Kurt Busiek and Jim Shooter, and never really leaving. This Marvel villain has carved out a genuinely distinctive niche, racking up 54 catalog appearances and five key-issue moments worth hunting down, with her most prominent stomping grounds being the pages of Captain America, Cable / Deadpool, and Alpha Flight. She keeps remarkably compelling company — sharing adventures with Captain America, Diamondback, Black Mamba, and Tanya Sealy among others — which speaks to how naturally she fits into Marvel's action-packed ensemble storytelling. For collectors who love a character with real longevity and a Bronze Age pedigree, Asp is absolutely worth a deeper look.