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 converted mana cost 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 turntimber, serpentine wood enters the battlefield, you may pay 3 life. if you don’t, it enters the battlefield tapped.
t: add g.