There could be other factors, like creature type (Kindred Dominance) or the creatures state on the board (Don't Move)

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Often built as a group slug deck, wherein we gift punishing cards like Steel Golem and Aggressive Mining to our foes, Zedruu can be built at the helm of a deck full of beneficial or merely influential effects
Do you think there should be more or less landwalk
Those 12 dual lands arent going to craft themselves