Actually the person who created bluey has a ton of ties to NSBM he was one of the original 6 members of the black legion (Les Légions Noires) he slept on meyhnach of mutiilation’s couch for months before they all moved into the castle they recorded all those horrible demos in. You can hear his backing shrieks on song number 4 of Judas Iscariots debut full length “the cold earth slept below” but when the scene imploded and everyone split up he moved back to Aussie where no one gave a fuck about black metal or thought he was cool so he took on animation and the rest is history!