The term 'God of Death' refers to two gods in ancient mythology: Osiris and Thanatos. Osiris was an Egyptian god who was believed to have been killed and resurrected, and was associated with the afterlife, fertility, and the cycle of Nile floods. Thanatos was a Greek god of death, often depicted as a young man with wings. He was the personification of death and was responsible for peacefully guiding the souls of the dead to the underworld.