Daemonomicon: College of Metal (Patreon)

Underneath the flaming skies and across the wastelands of Avernus one thing can be heard…  METAL The metal was invented in the hells by devils to bolster their own kin and incite violence  against the endless hordes of demons in the Blood War. The first bard to bring metal to material plane was a musician who was said to have been chosen by destiny to survive the  countless battles, learn to play metal, fight off its hateful corruption, and challenge the leader of  Avernus to a rock off. Many say all of Avernus shock during this legendary duel. In end the bard  won, took the archdevils tooth as a trophy, and brought metal for all mortals to enjoy

Art by Michael Verhaaf on Art Station