Reilly Tyne is the son of Ben Reilly (Spider-Man's clone) and Elizabeth Tyne. Before he reached his teens, his inherited powers began to manifest but brought with them clonal degeneration. Kaine, the degenerated first clone of Peter Parker, found him, and placed him within a regeneration tank to slow the process. Kaine's efforts were for two goals: to resurrect Daredevil, who had previously died saving Kaine, and to heal Tyne. Kaine summoned the demon Zarathos, which attempted to possess Tyne, but he was saved by the soul of Daredevil, who drove out Zarathos, although both Daredevil's soul and a piece of the demon remained within Tyne, and he was left with a demonic appearance and certain demonic abilities. Through meditation and concentration, Tyne eventually learned to project a human appearance, but he now looked to be in his twenties, almost twice his actual age. Following in both of Daredevil's paths, he studied law and became an attorney, while taking on a costume bearing a resemblance to Daredevil's and using his demonic abilities to fight crime as Darkdevil. He apparently has access to at least some of Daredevil's memories, since he knows Spider-Man's secret identity.