this.color.setGreen(true);
this.power = new MageInt(2);
this.toughness = new MageInt(3);
// {GU}, Sacrifice Grazing Kelpie: Put target card from a graveyard on the bottom of its owner's library.
Ability ability = new SimpleActivatedAbility(Zone.BATTLEFIELD, new PutOnLibraryTargetEffect(false), new ManaCostsImpl("{G/U}"));
ability.addCost(new SacrificeSourceCost());
ability.addTarget(new TargetCardInGraveyard());
this.addAbility(ability);
// Persist