As a child, when he did chores for a Native American man and his granddaughter, Raven Shadowheart, the human who would become Complete Carnage made the mistake of violating sacred ground, placing a curse on himself that would one day catch up with him (TMNT Vol. 1, #27). His origin story describes that he started out as a regular human construction worker. One day while he was fixing a cement wall, he was struck by lightning. This mutated him and turned him evil. The same lightning bolt also hit Raven Shadowheart when she was jogging in Central Park. She became "Radical" and represents ultimate good. He represents ultimate evil. They became arch-enemies.