WOW! I just tried to view it stereoscopicly and there is the fun part: I see mask and that means my brain receive stronger impulse from the right eye. I guess because the mask ir red. I have to "turn on" left eye to see the face and the coolest thing is that when you do this the mask slowly fades out from bottom to the top and reveals the face and THIS IS AWESOME!!! p.s. sorry for my English I hope you still understood what I want to say. p.s.s. good work!
With his mask he is a lot more scary but I expected some grandpa to be behind the mask. Without a mask I can take him a lot more serious. I do like the details on his clothes and sword, and the surrounding you drew is amazing. Also did you draw that moon from free hand? Or with a picture or similair to help you, because it looks amazing.