Nissa, Friend of Nature

+1: If a creature you control died this turn or last turn, add 3 mana of any color to your mana pool.
-2: Search your library for a forest, plains, or island land card and put it onto the battlefield tapped.
-7: You get an emblem with, "Mana doesn't empty from your mana pool. At the beginning of your turn, add 5 green mana to your mana pool.