The Spell of Life is what gives immortality to the first Dynasties, that were created before the Dja-akh struck the Underworld. It was designed by Isis and, while it was able to substain a body for millennia, it was flawed in that the recipient became a half-dead creature, resembling a walking corpse. Each group or camp of Mages that practiced it have added their own elements, beliefs and foci, this created the various dynasties, for each Dynasty had used a different variant to become immortal.