King Sombra (quick drawing)

I wanted to challenge myself to draw something in an hour, so I set my timer and drew this! Sombra isn't well-developed in the 'My Little Pony' show, but he gets major character development in the comics. He is my favorite villain because of the comics (although if the comics didn't exist, I'd have to pick Trixie... if she even counts). Anyway, there was supposed to be a bit more to the picture, but I didn't have time to add it. I think this turned out better than it would've with the added half-body, though. 

Requests and constructive criticism are welcome!