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
Painful Memories 1BSorcery Look at target opponent's hand and choose a card from it. Put that card on top of that player's library.
Karma 2WWEnchantment At the beginning of each player's upkeep, Karma deals damage to that player equal to the number of Swamps they control.
Mogg Assassin 2RCreature — Goblin Assassin {T}: You choose target creature an opponent controls, and that opponent chooses target creature. Flip a coin. If you win the flip, destroy the creature you chose. If you lose the flip, destroy the creature your opponent chose. 2/1
Whims of the Fates 5RSorcery Starting with you, each player separates all permanents they control into three piles. Then each player chooses one of their piles at random and sacrifices those permanents. (Piles can be empty.)
Tremble 1RSorcery Each player sacrifices a land.
Yawning Fissure 4RSorcery Each opponent sacrifices a land.
Circle of Protection: Art 1WEnchantment As Circle of Protection: Art enters the battlefield, choose an artist. {1}{W}: The next time a source of your choice with art by the chosen artist would deal damage to you this turn, prevent that damage. {1}{W}: Return Circle of Protection: Art to its owner's hand.
Hinterland Scourge Creature — Werewolf Hinterland Scourge must be blocked if able. At the beginning of each upkeep, if a player cast two or more spells last turn, transform Hinterland Scourge. 3/2
River Song's Diary 3Artifact Imprint — Whenever a player casts an instant or sorcery spell from their hand, exile it instead of putting it into a graveyard as it resolves. At the beginning of your upkeep, if there are four or more cards exiled with River Song's Diary, choose one of them at random. You may cast it without paying its mana cost.
Zevlor, Elturel Exile 1UBRLegendary Creature — Tiefling Warrior Haste {2}, {T}: When you next cast an instant or sorcery spell that targets only a single opponent or a single permanent an opponent controls this turn, for each other opponent, choose that player or a permanent they control, copy that spell, and the copy targets the chosen player or permanent. 4/2
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