Gemstone Caverns [The List] Battle for Zendikar Prerelease Promos you choose one of them

you choose one of them

Sacrifice Sword of the Ages and any number of creatures you control: Sword of the Ages deals X damage to any target

Set: Tenth Edition Type: Creature — Spirit Rarity: Rare Cost: {3}{G}{G} Untap all permanents you control during each other player's untap step

Set: Legends Type: Creature — Phoenix Rarity: Rare Cost: {4}{R}{R} Flying

but to surpass them

Gemstone Caverns [The List] Battle for Zendikar Prerelease Promos you choose one of themSet: 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.