Mayhem's lineup changed because of the murder of which founder of the early Norwegian black metal scene?
Euronymous Øystein Aarseth (] ; 22 March 1968 – 10 August 1993), who went by the pseudonym Euronymous, was a Norwegian guitarist. Euronymous was a founder of and central figure in the early Norwegian black metal scene. He was a co-founder of the Norwegian black metal band Mayhem. He was also founder and owner of the extreme metal record label Deathlike Silence Productions and record shop Helvete.
Egil Monn-Iversen Egil Ragnar Monn-Iversen (14 April 1928 – 7 July 2017) was a Norwegian musician, one of the most influential modern composers in Norway. He has had many important roles in Norwegian music, film, opera, television, comedy and theater. For some time he had so much influence in Norwegian culture that he got the nickname "The Godfather", even though he has always considered himself a down-to-earth musician.