Set and his brother, Osiris, ruled together in harmony as Ra, the king of the gods. However, Set soon became jealous of his brother and attacked him, weakening him substancially. Set later conquered Uruk, turning it into a barren and volcanic wasteland infested with his demons. He later constructed the powerful Castle of Uruk, along with the destructinve Eye of Ra to kill his brother. To protect himself, Osiris fled to Heliopolis and entered the Great Wall of Heliopolis that was constructed by Anubis. Set soon put his plans in motion to power the Eye with the three Sacred Crowns of Egypt. In order to kill Tutankhamen, he impersonated the Prince's brother, Akhenaten.