Nissa, Wild Guardian

+1: You gain 1 life. Put a +1/+1 counter on target creature.
0: Nissa, Wild Guardian becomes a 10/10 green Beast creature token with trample. Prevent all damage that would be dealt to her this turn.
-10: You get an emblem with "Whenever you gain life, create a green 3/3 Beast creature token with trample.