Turntimber Symbiosis // Turntimber, Serpentine Wood

Look at the top seven cards of your library. You may put a creature card from among them onto the battlefield. If that card has mana value 3 or less, it enters with three additional +1/+1 counters on it. Put the rest on the bottom of your library in a random order. --- As this land enters, you may pay 3 life. If you don't, it enters tapped. {T}: Add {G}.