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 a legendary 4/4 green Elemental creature token named Ashaya, the Awoken World.
−7: Untap up to six target lands. They become 6/6 Elemental creatures. They're still lands.