Search your library for a green creature card, reveal it, put it into your hand, then shuffle. At the beginning of your next upkeep, pay {2}{G}{G}. If you don't, you lose the game.
Near Mint - £2.30
Lightly Played - £1.90
Moderately Played - £1.60
Heavily Played - £1.20
Damaged - £0.70
Near Mint Non English - £2.30
Lightly Played Non English - £1.90
Moderately Played Non English - £1.60
Heavily Played Non English - £1.20
Damaged Non English - £0.70