Gemstone Cavern

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.