Heart of The Forest

{t}: Add {g} to your mana pool.
{g},{t}: Put a +1/+1 counter on target creature
you control. If that creature is a Druid or has
a +1/+1 counter on it, put +2/+2 counter on it instead.
At the beginning of your end step, if you control
a creature with power and toughness greater than
4, you gain 4 life.