Alioth

Few Marvel villains carry the sheer cosmic weight of Alioth, a malevolent entity who crashed onto the scene in 1993's Avengers: The Terminatrix Objective — a Copper Age time-travel epic conjured by Mark Gruenwald and Mike Gustovich. This fearsome force carved out a presence across the temporal reaches of the Marvel Universe, sharing the page with heavy hitters like Thor, Eric Masterson, Ravonna Renslayer, and the enigmatic Nathaniel Richards, before resurfacing in the landmark Avengers Forever. Rare in the catalog but formidable in stature, Alioth is the kind of deep-cut cosmic threat that rewards the fan willing to dig into Marvel's richly tangled tapestry of time and consequence.