Nissa, of Colossal Might

: Landfall - Whenever a land enters the battlefield under your control, create a token that's a copy of a permanent card in your hand at random.
+1: Untap up to three target lands. Draw a card for each color among those lands.
-6: The next time you tap a green source for mana, add 8 times the amount of mana that was supposed to be produced.