While the Validity of this card is still in question at the moment, I thought I should at least mention this card.
For 2W, Rootbound Defenses introduces what seems to be Selensnya’s new mechanic, Populate, which I see to be a very abuse-able mechanic. It creates a copy of any token you control. And then, it makes all of your creatures indestructible, for a whole turn, for only 2W.
Personally, I don’t know if this card is real. It seems rather overpowered for only 3 mana, and in Green/White Tokens (which will be good in standard if this is real) will be broken, dodging board wipes and fatal blocks, and populating their tokens. You can find discussion on the legality of this card here.