Tormentor is a black metal band formed in 1986 in Budapest, Hungary. They recorded their first album, Anno Domini, in 1988, but were unable to release it until the end of communism. The album reached Norway through the tape-trading community. Following the suicide of Per Ohlin, Mayhem invited Attila Csihar from Tormentor to join the band; he was to perform the vocals on De Mysteriis Dom Sathanas. Tormentor split up in 1991.