I don't know the story at all, but I suspect you cut to the brutal heart of its message, as you are so able to do. What I particularly admire is the positioning of Harry's head, and the foreshortening of his features. It's so hard not to get facial features squashed looking, and you managed to do that so very well.

On a different topic I'm reading a book with various authors' takes on Cenobites, and the scarification shown in your art is very much in line with images these stories paint in my head.