Wow, I really like the feel of darkness and the overall colour balance. I can't say anything about accuracy as I've never seen the films/read the books. But, I can safely assume THIS IS WHAT GOD LOOKS LIKE.
The only thing that I would do differently (if I could paint that well) is to add a darker shading on the outside of spikes seeing how the source of light is directly in the center of them. That the only thing that seemed "off" to me. Otherwise, that's pretty damn epic