For a long time now, there's been a theory that the prophesied "three-headed dragon" -- which Daenerys learned about in the House of the Undying -- will consist of her, Jon Snow, and Tyrion Lannister.

Often depicted as a three-headed dragon, Vritra was an anti-god who prevented and snuffed out life through many means. Like his Chinese counterparts, this dragon was a keeper of water, but he took ...

Cerberus, the hound of Hades, was the three-headed ... in Greek mythology, making Cerberus a sibling to several notable ...