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
Protective Sphere 2WEnchantment {1}, Pay 1 life: Prevent all damage that would be dealt to you this turn by a source of your choice that shares a color with the mana spent on this activation cost. (Colorless mana prevents no damage.)
Hall of Oracles Land {T}: Add {C}. {1}, {T}: Add one mana of any color. {T}: Put a +1/+1 counter on target creature. Activate only as a sorcery and only if you've cast an instant or sorcery spell this turn.
Cold Snap 2WEnchantment Cumulative upkeep {2} (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.) At the beginning of each player's upkeep, Cold Snap deals damage to that player equal to the number of snow lands they control.
Soul Tithe 1WEnchantment — Aura Enchant nonland permanent At the beginning of the upkeep of enchanted permanent's controller, that player sacrifices it unless they pay {X}, where X is its mana value.
Wild Dogs GCreature — Dog At the beginning of your upkeep, if a player has more life than each other player, the player with the most life gains control of Wild Dogs. Cycling {2} ({2}, Discard this card: Draw a card.) 2/1
Magnetic Mountain 1RREnchantment Blue creatures don't untap during their controllers' untap steps. At the beginning of each player's upkeep, that player may choose any number of tapped blue creatures they control and pay {4} for each creature chosen this way. If the player does, untap those creatures.
Thelon's Curse GGEnchantment Blue creatures don't untap during their controllers' untap steps. At the beginning of each player's upkeep, that player may choose any number of tapped blue creatures they control and pay {U} for each creature chosen this way. If the player does, untap those creatures.
Gift of Paradise 2GEnchantment — Aura Enchant land When Gift of Paradise enters the battlefield, you gain 3 life. Enchanted land has "{T}: Add two mana of any one color."
Timesifter 5Artifact At the beginning of each upkeep, each player exiles the top card of their library. The player who exiled the card with the highest mana value takes an extra turn after this one. If two or more players' cards are tied for highest, the tied players repeat this process until the tie is broken.
Dream Tides 2UUEnchantment Creatures don't untap during their controllers' untap steps. At the beginning of each player's upkeep, that player may choose any number of tapped nongreen creatures they control and pay {2} for each creature chosen this way. If the player does, untap those creatures.
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