I absolutely love these. A few months ago last year I was looking for dark elves (such as these ones) as references to personal villains in a Legend of Zelda fanfiction I'm writing (and currently revising) One of them, a demon king type guy, I couldn't figure out what to make him look like. Then I found these ABSOLUTELY PERFECT FREAKING PICTURES, and since then, my villain has taken up a resemblance to your dark elf-man, there. Not exact, but very close to it. So, for that inspiration, I thank and credit you.
The background makes me imagine that they are in some elaborate underground dwelling. They obviously just got done with a few "paintings" of their own, and if I had seen that, I would be running in the opposite direction. Well done.