Are they any good? They don't seem to be played as often as their equivalent models from other Factions (e.g. The Great Bears from Khador, or The Black Thirteenth from Cygnar, or The Withershadow Combine from Cryx). Is this just because Legion has a lot of other great stuff that people would rather use those points for? (Another beast? Reindeer? etc?) Or does the Blackfrost Shard Unit stink? Or is it that they're just not *quite* what you wanted, or just can't *quite* get the job done?