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
Phyrexian Splicer 2Artifact {2}, {T}, Choose flying, first strike, trample, or shadow: Until end of turn, target creature with the chosen ability loses it and another target creature gains it.
Grand Warlord Radha 2RGLegendary Creature — Elf Warrior Haste Whenever one or more creatures you control attack, add that much mana in any combination of {R} and/or {G}. Until end of turn, you don't lose this mana as steps and phases end. 3/4
Look at Me, I'm R&D 2WEnchantment As Look at Me, I'm R&D comes into play, choose a number and a second number one higher or one lower than that number. All instances of the first chosen number on permanents, spells, and cards in any zone are the second chosen number.
Crypt Ghast 3BCreature — Spirit Extort (Whenever you cast a spell, you may pay {W/B}. If you do, each opponent loses 1 life and you gain that much life.) Whenever you tap a Swamp for mana, add an additional {B}. 2/2
Krosan Cloudscraper 7GGGCreature — Beast Mutant At the beginning of your upkeep, sacrifice Krosan Cloudscraper unless you pay {G}{G}. Morph {7}{G}{G} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) 13/13
Countryside Crusher 1RRCreature — Giant Warrior At the beginning of your upkeep, reveal the top card of your library. If it's a land card, put it into your graveyard and repeat this process. Whenever a land card is put into your graveyard from anywhere, put a +1/+1 counter on Countryside Crusher. 3/3
Memory Theft 2BSorcery Target opponent reveals their hand. You choose a nonland card from it. That player discards that card. You may put a card that has an Adventure that player owns from exile into that player's graveyard.
Desecrate Reality 7Instant For each opponent, exile up to one target permanent that player controls with an even mana value. (Zero is even.) Adamant — If at least three colorless mana was spent to cast this spell, return a permanent card with an odd mana value from your graveyard to the battlefield.
Callous Oppressor 1UUCreature — Cephalid You may choose not to untap Callous Oppressor during your untap step. As Callous Oppressor enters the battlefield, an opponent chooses a creature type. {T}: Gain control of target creature that isn't of the chosen type for as long as Callous Oppressor remains tapped. 1/2
Junún Efreet 1BBCreature — Efreet Flying At the beginning of your upkeep, sacrifice Junún Efreet unless you pay {B}{B}. 3/3
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