Astaroth and sigil are up in the redbubble shop as a shirt and as a sticker! http://www.redbubble.com/people/smokingsheep/works/12160134-astaroth

I was a bit bummed that I messed up on his wings (I had originally intended for them to be inside the sigil’s circle), but I like this as well.

Although, uh, I drew Roth very beefy? I guess demons and fallen gods like to pump iron now and then.