Zurgo, Thunder's Decree is a more specific Zurgo commander, with a focus on warrior tokens and the mobilize mechanic
Ghalta and Mavren Ghalta and Mavren is a super strong legend from March of the Machine that gives you one of two attack triggers that go tall or wide with tokens and either one is a hefty pat on the back for going with Selesnya cards
However, even with just one opponent, that player will draw four cards, so that ends up being a total net loss of one card for you, which means Prosperity with X=4 was not card advantage
I like user Gentleman_Jaggis idea of defense battles have to be defended by their caster until they reach a certain condition, and war battles which have more universal effects and somehow end up throwing all players into the conflict
This set looks to be a promising one and here at Cool Stuff, the writers are breaking down every color of this set