Azazel claims that many years ago an ancient horde of demonic humanoid mutants from biblical times called the Neyaphem were in an epic battle with a group of angelic xenophobic mutants, named the Cheyarafim. The Cheyarafim were victorious in the battle and banished the "demons" to an alternate dimension for all eternity. The Neyaphem's leader, Azazel, was the only one who was able to breach the dimensional void for brief periods of time due to his teleportation powers. His only hope to return to Earth was by impregnating women because his children are linked to his dimension.