Øystein Aarseth (22 March 1968 – 10 August 1993), who went by the pseudonym Euronymous, was a Norwegian guitarist and 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.Euronymous was the founder of and central figure in the early Norwegian black metal scene until his murder by fellow musician Varg Vikernes in August 1993.
Often encouraged former Mayhem vocalist Dead to commit suicide, which he did in 1991.
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Was murdered by Mayhem band mate Varg Vikernes.
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Was a Satanist.
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Took photographs of Dead's corpse after he committed suicide in 1991. One of the photographs was stolen, and was used as the album cover of Mayhem's live, bootleg album "Dawn of the Black Hearts".
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Founding member, guitarist and main composer of black metal band Mayhem.