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
City of Ass Land City of Ass enters the battlefield tapped. {T}: Add one and one-half mana of any one color.
Guildmages' Forum Land {T}: Add {C}. {1}, {T}: Add one mana of any color. If that mana is spent on a multicolored creature spell, that creature enters the battlefield with an additional +1/+1 counter on it.
Drover of the Mighty 1GCreature — Human Druid Drover of the Mighty gets +2/+2 as long as you control a Dinosaur. {T}: Add one mana of any color. 1/1
Wishmonger 3WCreature — Unicorn Monger {2}: Target creature gains protection from the color of its controller's choice until end of turn. Any player may activate this ability. 3/3
Hotel of Fears Plane — Spacecraft At the beginning of your upkeep, exile the top card of your library. You lose life equal to its mana value. You may play that card this turn. Praise Him — Whenever chaos ensues, choose a color. Put X +1/+1 counters on target creature you control, where X is your devotion to that color. Then sacrifice another creature. (Your devotion to a color is the number of mana symbols of that color in the mana costs of permanents you control.)
Wose Pathfinder 1GCreature — Human Shaman {T}: Add one mana of any color. {6}{G}, {T}: Another target creature gets +3/+3 and gains trample until end of turn. 1/1
Treva, the Renewer 3GWULegendary Creature — Dragon Flying Whenever Treva, the Renewer deals combat damage to a player, you may pay {2}{W}. If you do, choose a color, then you gain 1 life for each permanent of that color. 6/6
Virtue of Strength 5GGEnchantment If you tap a basic land for mana, it produces three times as much of that mana instead.
Astrolabe 3Artifact {1}, {T}, Sacrifice Astrolabe: Add two mana of any one color. Draw a card at the beginning of the next turn's upkeep.
Blind Seer 2UULegendary Creature — Human Wizard {1}{U}: Target spell or permanent becomes the color of your choice until end of turn. 3/3
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