It was commissioned by the show's producers when the band appeared on the show as extras last year. The song was written around an idea that drummer Brann Dailor had in his kitchen.

Mastodon say: "Welsh illustrator Richey Beckett designed the artwork which was inspired by the show. The B-Side of the 12-inch features an a cappella version of White Walker, the original idea for the song recorded by Brann on his phone in his kitchen.