I've been working on a project and happened to start listening to basso profondo videos on YouTube. I'm no musician but was amazed at these deep singers from the Russian Orthodox tradition:
And how does this relate to DIY adventure gaming? . . . um imagine the demon singing like this as it slowly eviscerates your party. Or maybe this is the voice paladins sing with the one and only time they are ordained.
Update 4/28: check this out courtesy of ze Bullette's tip: