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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
Terrarion 1Artifact Terrarion enters the battlefield tapped. {2}, {T}, Sacrifice Terrarion: Add two mana in any combination of colors. When Terrarion is put into a graveyard from the battlefield, draw a card.
Cactus Preserve Land — Desert Cactus Preserve enters the battlefield tapped. {T}: Add one mana of any type that a land you control could produce. {3}: Until end of turn, Cactus Preserve becomes an X/X green Plant creature with reach, where X is the greatest mana value among your commanders. It's still a land.
Balduvian Shaman UCreature — Human Cleric Shaman {T}: Change the text of target white enchantment you control that doesn't have cumulative upkeep by replacing all instances of one color word with another. (For example, you may change "black creatures can't attack" to "blue creatures can't attack.") That enchantment gains "Cumulative upkeep {1}." (At the beginning of its controller's upkeep, that player puts an age counter on it, then sacrifices it unless they pay its upkeep cost for each age counter on it.) 1/1
A-Paragon of Modernity 4Artifact Creature — Angel Warrior Flying {3}: Paragon of Modernity gets +1/+1 until end of turn. If exactly three colors of mana were spent to activate this ability, put a +1/+1 counter on it instead. 2/3
Diamond Lion 2Artifact Creature — Cat {T}, Discard your hand, Sacrifice Diamond Lion: Add three mana of any one color. Activate only as an instant. 2/2
Kavu Chameleon 3GGCreature — Kavu This spell can't be countered. {G}: Kavu Chameleon becomes the color of your choice until end of turn. 4/4
High Tide UInstant Until end of turn, whenever a player taps an Island for mana, that player adds an additional {U}.
Intellect Devourer 3BCreature — Horror Devour Intellect — When Intellect Devourer enters the battlefield, each opponent exiles a card from their hand until Intellect Devourer leaves the battlefield. Body Thief — You may play lands and cast spells from among cards exiled with Intellect Devourer. If you cast a spell this way, you may spend mana as though it were mana of any color to cast it. 2/4
Channeler Initiate 1GCreature — Human Druid When Channeler Initiate enters the battlefield, put three -1/-1 counters on target creature you control. {T}, Remove a -1/-1 counter from Channeler Initiate: Add one mana of any color. 3/4
Drain Power UUSorcery Target player activates a mana ability of each land they control. Then that player loses all unspent mana and you add the mana lost this way.
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