The Stallion who Mounts the World is a figure of prophecy and legend in the culture of the Dothraki. He is believed to become the greatest khal that ever lived.
A Game of ThronesEdit
The first child of Daenerys Targaryen and Khal Drogo is proclaimed to be the stallion who mounts the world by the Dosh Khaleen when Drogo's Khalasar visits Vaes Dothrak. The child, who was to be named Rhaego died stillborn in the womb, however, after blood magic was performed by Mirri Maz Duur, stopping the stallion who mounts the world from ever being born.