Gemstone Caverns [The List] Fighting[-30] The system can be changed

The system can be changed from within

It also has 10 add-your-own-words cards

Set: Secret Lair Showdown Type: Instant Rarity: Rare Cost: {B} Add {B}{B}{B}

Repercussion deals that much damage to that creature's controller

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Gemstone Caverns [The List] Fighting[-30] The system can be changedSet: The List Type: Legendary Land Rarity: Rare If Gemstone Caverns is in your opening hand and you're not the starting player, 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. {T}: Add {C}. If Gemstone Caverns has a luck counter on it, instead add one mana of any color.