Awesome job! The background looks really nice as well as the lighting The shading on Tobi's mask looks really detailed and well done. The shadows on his cloak looks really nice and the sparkles in the sky look beautiful!
Oh my gosh! =D I love the dashes of white and the blur of the background; the colors your used were PERFECT, and the shading of his hair looks slick. There's such a smooth variation of color and his mask *o*