The Egyptian deity known for their role in the afterlife is Osiris. Osiris is often depicted as a mummified king, representing resurrection and eternal life. He presides over the judgment of souls in the underworld, particularly weighing the hearts of the deceased against the feather of Maat, the goddess of truth and justice. His story is central to Egyptian beliefs about death and rebirth, illustrating the cycle of life and the importance of moral behavior in attaining a happy afterlife.