Hmm well I think that this is pretty nice.
I like the base a lot. One thing you might want to do there is put some footprints in the snow behind him. You could also put some Feild grass or static grass around the base of the sign.
Did Mr Crom behead the guy that he is standing on or is it an empty helmet? If it is a beheaded head then some blood on the ground and on the sword might be nice.
The NMM looks pretty nice. Much better than any of my attempts.

The highlight on the axe looks a little strong (thick) you may want to tone that down some.
I like the horns and the cloak. Did you drybrush the cloak? The snow on the sholders is a nice touch.
The armor and the sheild while they look nice could also use A little highligh to make them pop.
Well I hope this may help some. Overall a very nice mini. Oh and welcome to the forums.