Nissa, Ulvenwald Awakener

+1: You may sacrifice a creature or a land. If you do, gain 1 life, draw a card and put a land from your hand onto the battlefield.
-2: Sacrifice a land or creature token you control, exile target nonland permanent an opponent controls.
-4: Create X 1/1 green saproling creature tokens where X is equal to the number of land and creature cards in all graveyards.