Mustis is the pseudonym of Øyvind Johan Mustaparta (born 10 September 1979), a Norwegian keyboardist best known for his work in the symphonic black metal band Dimmu Borgir, as well as the black/thrash metal band Susperia.
Dimmu Borgir: World Misanthropy
Dimmu Borgir: Live at Ozzfest
Dimmu Borgir: Live at Wacken Open Air
Dimmu Borgir: Live at Wacken Open Air 2007
Dimmu Borgir - The Invaluable Darkness