Excellent execution of a really creative idea. I especially love the wings and what you managed to make from the top three of "Warcraft's most dreadful wraps to work with".
The skin isn't dark per se, I'm uncertain have others tested it in-game to genuinely make a comment that it is - works just about perfect in most terrain lightnings when I've checked.
The skin tones, however, looks very plastic-ky, almost like rubber, mostly on the chest area. Face has no highlights whatsoever.
Overall, a great addition to the skin section, but can benefit a lot from minor tweaks.