Oh, and now that I'm past the initial "oh my god that's gorgeous reaction"... Beautiful work on the dry-brushing. I had to go back and re-read the post to realize that was how you did the blue. It actually looks like you've gone back and done the detail work in black over the blue, not vice versa. Very, very nicely done.

Did you consider doing a very light gold dry-brush over the black on the horns? They're a little flat compared to the rest of it (not that I don't think it's stunning - it's just that my capacity for analysis just kicked back in.)