He is Grimfrost Christbane(real name: Christian Godson).
Sometimes referred to as Grimfrost Christbane and the fuckers of the inverted cross When playing his songs live with a band. Grimfrost Christbane is the worlds only cacophonic a capella black metal act.
Bandmembers: Grimfrost Christbane Antichrist Necropants
Session Musicians: Mourndoom Daemonicus Warg Trvemonger Vlad Tepes III Darkwing Duck Rgvarhalgork Lucifugifer Watashi wa Necro desu Christopher Robin Picklefucker