super(ownerId, 274, "Gemstone Caverns", Rarity.RARE, new CardType[]{CardType.LAND}, "");
this.expansionSetCode = "TSP";
this.supertype.add("Legendary");
// If Gemstone Caverns is in your opening hand and you're not playing first, you may begin the game with Gemstone Caverns on the battlefield with a luck counter on it. If you do, exile a card from your hand.
this.addAbility(new GemstoneCavernsAbility());
// {tap}: Add {1} to your mana pool. If Gemstone Caverns has a luck counter on it, instead add one mana of any color to your mana pool.
Ability ability = new ConditionalManaAbility(Zone.BATTLEFIELD,
new ConditionalManaEffect(
new AddManaOfAnyColorEffect(),