Gylve Fenris Nagell (born 28 November 1971), better known as Fenriz, is a Norwegian musician who is best known as being one half of the metal duo Darkthrone. Although primarily a drummer, he has also performed bass, guitar and vocals for Darkthrone and a number of other metal bands. Fenriz is known for his refusal to play live, his obsessiveness about music listening, supporting other underground bands and his lack of interest in the mainstream music business in general.