Einar Selvik, also known by his stage name Kvitrafn, is a Norwegian musician known for being the drummer of black metal band Gorgoroth from 2000 to 2004, and for fronting the Nordic folk project Wardruna, founded in 2002. Selvik and Wardruna earned international prominence for contributing to the soundtrack and score of the television show Vikings. Selvik is a founder of By Norse, a platform to support Norse and Norse-related art, music, literature, film and culture.

Gorgoroth is a Norwegian black metal band based in Bergen. It was formed in 1992 by guitarist Infernus, who is the sole original member remaining, and has released nine studio albums. Gorgoroth are a Satanic band and have drawn controversy due to some of their concerts, which have featured impaled sheep heads and mock crucifixions. The band is named after the dead plateau of darkness in the land of Mordor from J. R. R. Tolkien's fantasy novel The Lord of the Rings.