One of the Jackal's earliest failed clone experiments, Kaine is actually a hyper-mutated duplicate of Peter Parker! Possessing more potent versions of Parker's own spider powers, Kaine is also plagued with constant pain. With mysterious reasons known only to himself, Kaine taunts Peter Parker and his clone Ben Reilly, leading them to wonder who is the clone and who is Parker. Destined to die by his own out-of-control powers, Kaine is content to watch and wait while manipulating lives from the shadows!