Nissa, Envoy of Nature

+1: Add one mana of any color. If this mana was used to cast a green creature, it enters the battlefield with three +1/+1 counters.
0: Target Forest you control gains, "Spells cast with this Forest can't be countered."
-5: All basic lands you control become 5/5 elemental creature tokens until end of turn. Creatures you control gain vigilance until end of turn.