VIDEO : 'Game of Thrones' Creators Reveal Night King's Motive

Family squabbles, historic rivalries, and claims to the Iron Throne have caused havoc in Westeros throughout the entirety of Game of Thrones, but while the Seven Kingdoms have fought among themselves for control, another threat has amassed north of the Wall. Now, winter has come, and the Night King marches south.Many villains have cropped up ...