Ooh where to begin? They used to play with impaled animal heads on the stage, Dead used to cut himself whilst performing, then when he killed himself with a shotgun, Euronymous’s first reaction was to rearrange his body and take a picture, which was used as the cover to a bootleg, he also made necklaces out of fragments of Dead’s skull, and sold other fragments. Varg (the same Varg from Burzum) is a neonazi and burnt down at least one church, reportedly with Euronymous. Varg also murdered Euronymous as he believed Euronymous wanted to kill him. You’ll struggle to find a more messed up band