1992 debut album from the Norwegian Black Metal band. Members of Old Funeral and Amputation formed Immortal in 1990, with Abbath on bass and lead vocals, Demonaz on guitar, and Armagedda on drums. The music on their early demo recordings was Death Metal. The band then became influenced by Euronymous and bands like Bathory and Celtic Frost They released their self-titled EP in 1991, which saw a stylistic change to Black Metal. This was followed by Diabolical Fullmoon Mysticism.