This is overall a very nice piece of art! Urnam's expression is displayed very well and the effect of the picture is amazing! The colors are extremely well used and the shading is very good as well! However, the lightning bolts seem not quite "Shocking" (lame pun XD) enough. They are well shaped and spread out in a great array, but they aren't explosively bright. Electricity should be as bold and bright as possible, because it is pure energy! I feel like they should have a bit more snap and crack with the lighting but otherwise, everything looks very well done! This is a piece you should be proud of!
Hope I wasn't too harsh this is my first critique!