Nissa, Sage Animist

+1: Reveal the top card of your library. If it's a land card, put it onto the battlefield. Otherwise, put it into your hand.
-2: Create Ashaya, the Awoken World, a legendary 4/4 green Elemental creature token.
-7: Untap up to six target lands. They become 6/6 Elemental creatures. They're still lands.