public Millstone(UUID ownerId) {
super(ownerId, 390, "Millstone", Rarity.RARE, new CardType[]{CardType.ARTIFACT}, "{2}");
this.expansionSetCode = "5ED";
// {2}, {tap}: Target player puts the top two cards of his or her library into his or her graveyard.
Ability ability = new SimpleActivatedAbility(Zone.BATTLEFIELD, new PutLibraryIntoGraveTargetEffect(2), new GenericManaCost(2));
ability.addCost(new TapSourceCost());
ability.addTarget(new TargetPlayer());
this.addAbility(ability);
}