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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
Gond Gate Land — Gate Gates you control enter the battlefield untapped. {T}: Add {C}. {T}: Add one mana of any color that a Gate you control could produce.
Xanathar, Guild Kingpin 4UBLegendary Creature — Beholder At the beginning of your upkeep, choose target opponent. Until end of turn, that player can't cast spells, you may look at the top card of their library any time, you may play the top card of their library, and you may spend mana as though it were mana of any color to cast spells this way. 5/6
Gold Mine Land {T}: Add {C}. Legacy — {T}, Mark one of Gold Mine's unmarked nodes: Add one mana of any color. ☐, ☐, ☐, ☐, ☐
Mirrored Lotus 0Artifact Reflect {0} (As this enters the battlefield, each opponent may pay {0}. When they do, they create a token copy of this except it lacks this ability.) {T}, Exile Mirrored Lotus: Add three mana of any one color.
Haldan, Avid Arcanist 2ULegendary Creature — Human Wizard Partner with Pako, Arcane Retriever (When this creature enters the battlefield, target player may put Pako into their hand from their library, then shuffle.) You may play lands and cast noncreature spells from among cards you exiled that have fetch counters on them, and you may spend mana as though it were mana of any color to cast those spells. 1/4
Triarch Stalker 3BBArtifact Creature — Necron Targeting Relay — At the beginning of combat on your turn, choose an opponent. Creatures attacking the last chosen player have menace. 4/5
Covetous Urge U/BU/BU/BU/BSorcery Target opponent reveals their hand. You choose a nonland card from that player's graveyard or hand and exile it. You may cast that card for as long as it remains exiled, and you may spend mana as though it were mana of any color to cast that spell.
Psychic Intrusion 3UBSorcery Target opponent reveals their hand. You choose a nonland card from that player's graveyard or hand and exile it. You may cast that card for as long as it remains exiled, and you may spend mana as though it were mana of any color to cast that spell.
Branch of Vitu-Ghazi Land {T}: Add {C}. Disguise {3} (You may cast this card face down for {3} as a 2/2 creature with ward {2}. Turn it face up any time for its disguise cost.) When Branch of Vitu-Ghazi is turned face up, add two mana of any one color. Until end of turn, you don't lose this mana as steps and phases end.
All Is Dust 7Tribal Sorcery — Eldrazi Each player sacrifices all permanents they control that are one or more colors.
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