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17 May 2024: Card library updated.

Hall of Gemstone

1GG · World Enchantment

At the beginning of each player's upkeep, that player chooses a color. Until end of turn, lands tapped for mana produce mana of the chosen color instead of any other color.

Similar cards

Color identity:
NameManaTypeText
Pillar Tombs of Aku 2BBWorld Enchantment At the beginning of each player's upkeep, that player may sacrifice a creature. If that player doesn't, they lose 5 life and you sacrifice Pillar Tombs of Aku.
Intellectual Offering 4UInstant Choose an opponent. You and that player each draw three cards. Choose an opponent. Untap all nonland permanents you control and all nonland permanents that player controls.
Moonbow Illusionist 2UCreature — Moonfolk Wizard Flying {2}, Return a land you control to its owner's hand: Target land becomes the basic land type of your choice until end of turn. 2/1
Ironfang Creature — Werewolf First strike At the beginning of each upkeep, if a player cast two or more spells last turn, transform Ironfang. 3/1
Jinxed Idol 2Artifact At the beginning of your upkeep, Jinxed Idol deals 2 damage to you. Sacrifice a creature: Target opponent gains control of Jinxed Idol.
Shared Triumph 1WEnchantment As Shared Triumph enters the battlefield, choose a creature type. Creatures of the chosen type get +1/+1.
Distract the Hydra Sorcery Each player may sacrifice a creature. Each player who sacrificed a creature this way chooses a Head and taps it. Each player who didn't sacrifice a creature loses 3 life.
Vexing Arcanix 4Artifact {3}, {T}: Target player chooses a card name, then reveals the top card of their library. If that card has the chosen name, that player puts it into their hand. Otherwise, they put it into their graveyard and Vexing Arcanix deals 2 damage to them.
Kookus 3RRCreature — Djinn Trample At the beginning of your upkeep, if you don't control a creature named Keeper of Kookus, Kookus deals 3 damage to you and attacks this turn if able. {R}: Kookus gets +1/+0 until end of turn. 3/5
Uphill Battle 2REnchantment Creatures played by your opponents enter the battlefield tapped.
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