Isaa, Tranquil Pilgrim

: Whenever a creature token enters the battlefield under your control you gain life equal to it's toughness.
+1: Create a green Treefolk creature token with "This creature's power and toughness are equal to the number of Forests you control."
-6: Tap each non-token creature, token creatures you control gain +3/+3 and vigilance until the end of turn.