Soldiers often dominate a ground game, then Harbin lets you count up your lethal damage and overwhelm an opponent that might have a few fliers, or even one big one, but it's rarely enough to defend against a pumped battalion flying at them
If you were hesitant to go for an unfair approach in Cube before now, hopefully you are coming away with the tools to identify and take advantage of some of the sideways strategies available, and become the unfairest of them all
Golgari can do it too, though, and has access to a bunch of good commanders like Carth the Lion or partner decks with Reyhan, Last of the Abzan
Or, using Thrasios, Triton Hero and its partner ability to make all kinds of different colored decks
I doubt Crdan the Shipwright will keep such a high price for long, but Id bet itll still hold some value