LOVE the sky/horizon very effective use of contrast and...I love dragons!
Something about the left wing doesn't bake my noodle just right. I think it's too dark, and the fact that the wings appear to share almost no color doesn't look right. I think if you merged colors a little bit, put a little brown in the right one and a little purple in the left one, as well as either darkening the right wing or lightening the left wing, it would totally rock.
As of right now its a 4/5, but dude it looks really nice either way. Still impressive use of only 16 colors ^_^
cool it looks like a drowing from an old book. love it 5/6