this.color.setGreen(true);
// Search your library for a green creature card, reveal it, and put it into your hand. Then shuffle your library.
this.getSpellAbility().addEffect(new SearchLibraryPutInHandEffect(new TargetCardInLibrary(filter), true, true));
// At the beginning of your next upkeep, pay {2}{G}{G}. If you don't, you lose the game.
this.getSpellAbility().addEffect(new CreateDelayedTriggeredAbilityEffect(new PactDelayedTriggeredAbility(new ManaCostsImpl("{2}{G}{G}"))));
}