Legendary Land 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.
Rare
{T}: 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.
Illus. Martina Pilcerova

9/25/2006: After all players have decided not to take any more mulligans, players choose whether to put Leylines and/or Gemstone Caverns onto the battlefield, starting with the player who will be going first and proceeding in turn order. Each player may choose any number of Leylines and/or Gemstone Caverns. The cards are revealed and put onto the battlefield at the same time.
9/25/2006: If multiple Gemstone Caverns are put onto the battlefield before the game begins, the "legend rule" won't put them all into the graveyard until just before the first player gets priority during his or her first upkeep step. There's no opportunity to tap them for mana.
6/1/2011: Your "opening hand" is the hand of cards you decide to start the game with after taking any mulligans.
6/1/2011: After all players have decided not to take any more mulligans, if the starting player has any cards that allow actions to be taken with them from a player's opening hand, that player may take the actions of any of those cards. The starting player repeats this, taking all actions he or she wishes to, one at a time. Then each other player in turn order may do the same. After each player has exercised his or her option to take actions from his or her opening hand, the first turn of the game begins.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Classic (MTGO)
Legal in Commander
Legal in Modern