Great looking Commander.
I really like the rich blue and contrasting reds. The base is great as well.
Arkesh: Ultramarines have fought on winter worlds countless of times. Macragge was one of them. And most chapters have "psyber animals" as familiars. The wolf here doesn't have to be a Fenrisian wolf. It's like bitching Njal Stormcaller for having a raven when there is a chapter like Raven Guard :P
Vote
