Caliban is a mutant character in the Marvel Comics universe. The character's first appearance was in Uncanny X-Men #148.
Caliban is a mutant with the ability to psionically sense other mutants out to several miles away and track their movements. He also has the ability to psionically sense, absorb, and turn the psionic energy of fear radiated by humans against them, inducing more intense fear within their minds.
He is a formidable hand-to-hand combatant, having been trained by Iceman and later Apocalypse.
As Death, he attained superhuman strength, speed, agility, reflexes, coordination, balance, and endurance, as well as claws and fangs, through Apocalypse's genetic manipulation. He also has great skill at climbing and possesses superhuman leaping ability. He was also mentally conditioned to attack Apocalypse's former ally Mister Sinister on sight.
As Pestilence, Apocalypse gave him the ability to generate a mental plague, a virus that attacks from within on the highest planes of the psyche and breaks down the mental functions of the target.
After being reverted to his original form, he still appears to retain some superhuman strength affected by his adrenalin, as he was shown lifting rubble off of Skids that proved difficult for even Warpath to hoist.
After being ressurected through the Technarch transmode virus his ability changed to psionically sense not other mutants but other dead mutants.