Mayhem is a Norwegian black metal band formed in 1984 in Oslo, regarded as one of the pioneers of the Norwegian black metal scene. Mayhem's career has been highly controversial, primarily due to their violent stage performances, the 1991 suicide of vocalist Per Yngve Ohlin ("Dead") and the 1993 murder of guitarist Øystein Aarseth ("Euronymous") by former member Varg Vikernes ("Count Grishnackh"), of Burzum.