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. Fenriz has had three solo projects: the folk metal project Isengard, the dark ambient project Neptune Towers and the doom metal project Red Planet.
Darkthrone was created as a death metal band by the name of Black Death in 1986. In 1987 he got involved with the group Valhall, which practiced in his basement. Fenriz said he had a passive interest in Bathory by 1986, but claims that he did not understand the "darkness" of black metal until hearing a song by the Hungarian band Tormentor in 1989 (he gives similar credit to Mercyful Fate). The same year, Fenriz left Valhall to focus on Darkthrone, which became one of the key bands in the early Norwegian black metal scene. He also began a folk metal project called Isengard, for Darkthrone was at the time a band that opposed stylistic progression and change. Fenriz's solo ambient project Neptune Towers served as an example of his varied musical tastes. It was followed by another quintessential contribution to the folk metal scene with Storm.
Fenriz now claims to be apolitical, remaining non-partisan towards the events of early Norwegian black metal. In one interview, Fenriz said that he was against the book Lords of Chaos, comparing its hype to Oprah. Fenriz prefers to keep Darkthrone out of the spotlight. In late 2004, he turned down a nomination for a Norwegian Alarm Award. He claimed that Darkthrone had "no interest in being part of the glitter and showbiz side of the music industry". Fenriz is one of the main characters in the 2009 documentary film Until The Light Takes Us (filmed in the early 2000s).