Death came into existence in prehistory, acted as the grim reaper for years, taking the souls of many who's time to die had come. Skips' being granted immortality by The Guardians of Eternal youth greatly irritated him, and he kept saying he would take his soul eventually, although he never got to. Death apparently entered plenty of eating challenges, and never lost. Death's first appearance was in Over The Top, where Skips had accidentally killed Rigby. He appeared to take Rigby's soul before Skips made a deal to bring him back. After cheating Death, he comes forth with his end of the deal and brings Rigby back alive. Before leaving he tells Skips that someday he will have his immortal soul.