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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
Conversion 2WWEnchantment At the beginning of your upkeep, sacrifice Conversion unless you pay {W}{W}. All Mountains are Plains.
Glaciers 2WUEnchantment At the beginning of your upkeep, sacrifice Glaciers unless you pay {W}{U}. All Mountains are Plains.
Phantasmal Forces 3UCreature — Illusion Flying At the beginning of your upkeep, sacrifice Phantasmal Forces unless you pay {U}. 4/1
Illusionary Forces 3UCreature — Illusion Flying Cumulative upkeep {U} (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.) 4/4
Pir's Whim 3GSorcery For each player, choose friend or foe. Each friend searches their library for a land card, puts it onto the battlefield tapped, then shuffles. Each foe sacrifices an artifact or enchantment they control.
The Eternal Wanderer 4WWLegendary Planeswalker No more than one creature can attack The Eternal Wanderer each combat. [+1]: Exile up to one target artifact or creature. Return that card to the battlefield under its owner's control at the beginning of that player's next end step. [0]: Create a 2/2 white Samurai creature token with double strike. [−4]: For each player, choose a creature that player controls. Each player sacrifices all creatures they control not chosen this way. Loyalty 5
Rotting Regisaur 2BCreature — Zombie Dinosaur At the beginning of your upkeep, discard a card. 7/6
Frenzied Fugue 3REnchantment — Aura Enchant permanent When Frenzied Fugue enters the battlefield or at the beginning of your upkeep, gain control of enchanted permanent until end of turn. Untap that permanent. It gains haste until end of turn.
Lurking Spinecrawler 3BCreature — Horror When Lurking Spinecrawler enters the battlefield, you may choose a nonland card in your hand. If you do, that card perpetually incorporates {1}{B} and gains "When you cast this spell, each opponent sacrifices a creature. Each opponent who can't discards a card." Whenever you cast a multicolored spell, for each of that spell's colors, each opponent loses 1 life and you gain 1 life. 5/4
Chromium 2WWUUBBLegendary Creature — Elder Dragon Flying Rampage 2 (Whenever this creature becomes blocked, it gets +2/+2 until end of turn for each creature blocking it beyond the first.) At the beginning of your upkeep, sacrifice Chromium unless you pay {W}{U}{B}. 7/7
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