Immortal is a prominent black metal band from Bergen, Norway. The group began in 1989 as "Amputation", a death metal band. Immortal's early full-length releases were of a traditional, yet complex black metal style, but their acclaimed album At the Heart of Winter saw the band begin to experiment with a fusion of black metal and German thrash. The resulting sound was a style which characterized Immortal's later works. Immortal has been influential to many modern metal artists.