Odin, the God Who Rides Forth

I have finally found a culture whose obsession for detail has put me off. 
Norse. 
(And the following traditions of Viking and Celtic art)
I will not be doing another border any time soon. 
No, it's not Anthony Hopkins, and I tried very hard to stay away from the Marvel movie's helmet design.  I've read passages that describes the helmet as having wings and I've read things that say it's horned.  Initially I had sketched up a design where it looked from wings from the side and horns from the front, but promptly killed that potential with the 3/4 view.  Oh well. 

Who are the twain that on ten feet run? Three eyes they have, but only one tail?

Good is thy riddle, and guessed it is: that it is Odin, riding on Sleipnir!

Geri and Freki the battle-accustomed father of hosts feeds, but on wine alone spendidly-weaponed Odin ever lives.

Two ravens sit on his shoulders and speak into his ear all the news they see and hear. Their names are Hugin and Munin. He sends them out at dawn to fly over all the world, and they return at dinner-time. As a result, he knows of many events. From this he gets the name "Raven-God."

(Paraphrased from Heiðreks gátur and Grímnismál)