Gemstone Caverns

If Gemstone Caverns is in your opening
hand and you're not playing first, you may
begin the game with Gemstone Caverns in
play with a luck counter on it. If you do,
remove a card in your hand from the game.
{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.