It's really awesome!
I love this concept and I was overjoyed to see it. Favorited. 10/10. The teeth and the dried blood around his mouth are wonderfully angled correctly.
I can't quite see what is going on in the man's back, though. I get the notion that he's tied up, but I can't really see where his arms start and stop. It could just be my eyes though. Still. 10/10.