The unborn son Rhaego of Daenerys Targaryen was hailed to be the Stallion who Mounts the World. However, after a ritual to save Khal Drogo's life, Rhaego was reportedly born a dead scaled monstrosity.

Khal Drogo seems willing to cross the Narrow Sea in "Wooden Horses" (ships) to conquer Westeros for Daenerys and their son Rhaego.