The Spirit of the Forest

The Spirit of the Forest has indestructible as long
as you control an island, mountain and forest.
Whenever a creature enters the battlefield under
your control, mill 3 cards. You gain 1 life for each creature milled this way.
Whenever a creature you control dies, you may
return a card from your graveyard to your hand.
If it's a creature, you lose 1 life.