I love the unique theming and vibe of this faction!
I've not seen an ability like Public Support before it's a very cool idea - I do wonder about the balance since defenders already take the lower dice in battle it seems quite a high likelihood your temporary warrior might not make any difference as you won't get the hits needed for them to make an impact in the battle?
The way warriors "swarm" in I like a lot and the fact the trees become permanent with enough time is very interesting!
Other than that some of the layout of the board and wording of some things I personally found a bit unclear but that's a minor nitpick and definitely easily fixed. Thanks for including a Law of Root that for sure helped with my understanding!