Terrus, Mind of Nature

Terrus, Mind of Nature enters the battlefield tapped.
{t}: Add {g} to your mana pool.
{t}, Sacrifice Terrus, Mind of Nature: Put a +1/+1 counter on target creature.
{3}: Return Terrus, Mind of Nature from your graveyard to your hand.
An infinite cycle of life and death, only the hardiest of animals survive through its treacherous treelines and dangerous cliffs.