Absolutely amazing attention to detail. His face is awesomely drawn. The bluish color really contributes to the mood. Also, I really like the perspective from which you can see him, and everything else that surrounds him. Unfortunately, I admit my ignorance as I don't really understand the reference, but still, from an objective point of view, it's really amazing.
WOTAN - that's a Classic Doctor Who reference! 1966, "The War Machines" - WOTAN; Will Operating Thought Analogue - sort of like SkyNet, it creates war machines to conquer the world - but not before reprogramming people's minds.