This is an amazing piece. Texture, color, detail. That sky is beautiful. I love both Nightmare and Celestia's hair and the anatomy, however, I'm unsure of the mood the characters are portraying. The poses are also kind of confusing and forgive me please but when I look at Nightmare, I can't help but think of her screaming "HURR DURR!" She's really kinda like "Hey, sup?" I feel that Nightmare's pose should be less dainty, more "rawr!" intimidating. And Celestia's face. Not sure if surprised, scared,... happy, expectant???



But yeah, I'm sorry, I know I'm not very good at this critique thing, but overall, I think this is a stunning piece.