Rhaego is a minor character in the first and second seasons. He was the son of Khal Drogo and Khaleesi Daenerys Targaryen. He was named in honor of his uncle, Prince Rhaegar Targaryen. According to a Dothraki prophecy, he would have been the Stallion Who Mounts the World, a great khal of khals who would have united the Dothraki as one horde and used them to conquer the entire world. He was stillborn after being involved in a blood magic ritual performed by Mirri Maz Duur.