Card Codex

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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
Unmask 3BSorcery You may exile a black card from your hand rather than pay this spell's mana cost. Target player reveals their hand. You choose a nonland card from it. That player discards that card.
Yurlok of Scorch Thrash 1BRGLegendary Creature — Viashino Shaman Vigilance A player losing unspent mana causes that player to lose that much life. {1}, {T}: Each player adds {B}{R}{G}. 4/4
Winding Way 1GSorcery Choose creature or land. Reveal the top four cards of your library. Put all cards of the chosen type revealed this way into your hand and the rest into your graveyard.
Comet Storm XRRInstant Multikicker {1} (You may pay an additional {1} any number of times as you cast this spell.) Choose any target, then choose another target for each time this spell was kicked. Comet Storm deals X damage to each of them.
Standard Procedure Instant {1}, Reveal Standard Procedure from your hand: Choose an instant or sorcery card with mana value 3 or less currently legal in the Standard format. Standard Procedure becomes that card until end of turn.
Endless Whispers 2BBEnchantment Each creature has "When this creature dies, choose target opponent. That player puts this card from its owner's graveyard onto the battlefield under their control at the beginning of the next end step."
Harbinger of Night 2BBCreature — Spirit At the beginning of your upkeep, put a -1/-1 counter on each creature. 2/3
Gorilla War Cry 1RInstant Cast this spell only during combat before blockers are declared. All creatures gain menace until end of turn. (They can't be blocked except by two or more creatures.) Draw a card at the beginning of the next turn's upkeep.
Explosion of Riches 5RSorcery Draw a card, then each other player may draw a card. Whenever a card is drawn this way, Explosion of Riches deals 5 damage to target opponent chosen at random from among your opponents.
Aku Djinn 3BBCreature — Djinn Trample At the beginning of your upkeep, put a +1/+1 counter on each creature each opponent controls. 5/6
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