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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
Vedalken Engineer 1UCreature — Vedalken Artificer {T}: Add two mana of any one color. Spend this mana only to cast artifact spells or activate abilities of artifacts. 1/1
Sonic Screwdriver 3Artifact {T}: Add one mana of any color. {1}, {T}: Untap another target artifact. {2}, {T}: Scry 1. (Look at the top card of your library. You may put that card on the bottom.) {3}, {T}: Target creature can't be blocked this turn.
Contamination 2BEnchantment At the beginning of your upkeep, sacrifice Contamination unless you sacrifice a creature. If a land is tapped for mana, it produces {B} instead of any other type and amount.
Vorinclex, Voice of Hunger 6GGLegendary Creature — Phyrexian Praetor Trample Whenever you tap a land for mana, add one mana of any type that land produced. Whenever an opponent taps a land for mana, that land doesn't untap during its controller's next untap step. 7/6
Ugin's Construct 4Artifact Creature — Construct When Ugin's Construct enters the battlefield, sacrifice a permanent that's one or more colors. 4/5
Galazeth Prismari 2URLegendary Creature — Elder Dragon Flying When Galazeth Prismari enters the battlefield, create a Treasure token. Artifacts you control have "{T}: Add one mana of any color. Spend this mana only to cast an instant or sorcery spell." 3/4
Bounty Board 3Artifact {T}: Add one mana of any color. {1}, {T}: Put a bounty counter on target creature. Activate only as a sorcery. Whenever a creature with a bounty counter on it dies, each of its controller's opponents draws a card and gains 2 life.
Infernal Darkness 2BBEnchantment Cumulative upkeep—Pay {B} and 1 life. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.) If a land is tapped for mana, it produces {B} instead of any other type.
Beckoning Will-o'-Wisp 2WCreature — Spirit Flying Lure the Unwary — At the beginning of combat on your turn, choose an opponent. Creatures attacking the last chosen player get +1/+0. 1/3
Leyline Immersion 3GEnchantment — Aura Enchant legendary creature Enchanted creature has ward {2} and "{T}: Add five mana in any combination of colors. Spend this mana only to cast spells."
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