Caliban was one of the Morlocks, a collection of mutants who lived in the tunnels beneath Manhattan. His mutant-locating power made him very useful in locating and recruiting new members for the group. With the destruction of the Morlock community, Caliban joined X-Factor, but self-doubt caused him to ally himself with Apocalypse. Apocalypse modified Caliban's abilities, turning him into his Hell Hound.

Caliban threw in with Apocalypse in the hope that Apocalypse would increase his powers. This he did, in the process transforming Caliban from an ineffective mutant into a powerful, evil creature completely under his control. In order to prove his worth, Caliban battled both Archangel and Sabretooth.

Note that lately, Caliban has returned to the good side, joining X Force.

KNOWN POWERS Mutant Detection: AM ability, within 25 miles. Fear-Enhanced Strength: When Caliban is afraid, he can boost his Strength to RM (and Health to 76).The increased Strength lasts until he fails a Green Endurance FEAT or until the cause of fear goes away.

Emotion Projection: Caliban can project fear with IN intensity. The target must be no more than one area away. Night Vision: Caliban can see in the dark.