there we have the typical designer. Your skill is great but you artistic knowledge is bad.
Odin* not Ohdin. The second thing is that His weapon looks more like a Hammer which is called Mj�lnir.
A little excurse in nordic religion.
Loki, a little mean tard among all the gods thought he could do sth very funny and shaved the golden hairs of Tors wife. Tor got enrage and threatened Loki with death. As excuse he had to bring her new hairs. even better than her old and a very good excuse in form of presents. So he went to the dwarfes.
The dwarfes known as the best smiths in world made him new hairs but he also challanged the dwars without they noticed to make the best presents for the gods.
In short: he did not only get the hairs he had to get but also weapons and some other cool presents.
Among the weapons there was a hammer for Tor and a spear for odin. Besides I can explain why nordic hammers look very short. Loki as he always has to be a little tard, changed into a fly and attacked teh dwarf who was occupied with the hammer. The dwarf forgot to heat the fire because he was punching away the fly, so the shaft of the hammer broke. The rest was OK though only the shaft became shortened.
Tor’s hammer always returned when thrown like a boomerang.
And Odens spear always hit the target like a seekermissl.
You did not do Odin here you did Tor. That’s quite a fail. No offence though. But this is just showing ignorance.
Never the less is your picture very well done. At least the undead.
“Ohdin” looks more like a common wannabeviking conept. Not as spectacioulos as the other guy. Hope you never do the same mistake again 
A good artist always has a good background knowledge.