Styr is a fearsome warrior and leader of the Thenns, a clan of the Free Folk (also known as wildlings). He leads one of the wildling groups brought together by the King-Beyond-the-Wall, Mance Rayder. He is the Magnar of the Thenn and joins forces with Tormund Giantsbane to climb the Wall and invade the Seven Kingdoms, starting by burning down Castle Black and the Night's Watch. Styr was cut from season 3 and replaced by Tormund. He serves as a main antagonist to Jon Snow and the Night's Watch during season 4 of the HBO Fantasy drama series, Game of Thrones, and the ASOIAF novel series it is based off of, written by Geroge R.R. Martin.