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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
Strength of Unity 3WEnchantment — Aura Enchant creature Domain — Enchanted creature gets +1/+1 for each basic land type among lands you control.
Well of Ideas 5UEnchantment When Well of Ideas enters the battlefield, draw two cards. At the beginning of each other player's draw step, that player draws an additional card. At the beginning of your draw step, draw two additional cards.
Thoughtleech GGEnchantment Whenever an Island an opponent controls becomes tapped, you may gain 1 life.
Prognostic Sphinx 3UUCreature — Sphinx Flying Discard a card: Prognostic Sphinx gains hexproof until end of turn. Tap it. Whenever Prognostic Sphinx attacks, scry 3. 3/5
Mystifying Maze Land {T}: Add {C}. {4}, {T}: Exile target attacking creature an opponent controls. At the beginning of the next end step, return it to the battlefield tapped under its owner's control.
Shadow of the Enemy 3BBBSorcery Exile all creature cards from target player's graveyard. You may cast spells from among those cards for as long as they remain exiled, and mana of any type can be spent to cast them.
Zellix, Sanity Flayer 2ULegendary Creature — Horror Hive Mind — Whenever a player mills one or more creature cards, you create a 1/1 black Horror creature token. {1}, {T}: Target player mills three cards. Choose a Background (You can have a Background as a second commander.) 2/3
Pit Scorpion 2BCreature — Scorpion Whenever Pit Scorpion deals damage to a player, that player gets a poison counter. (A player with ten or more poison counters loses the game.) 1/1
Ore-Rich Stalactite 1RArtifact {T}: Add {R}. Spend this mana only to cast an instant or sorcery spell. Craft with four or more red instant and/or sorcery cards {3}{R}{R} ({3}{R}{R}, Exile this artifact, Exile the four or more from your graveyard: Return this card transformed under its owner's control. Craft only as a sorcery.)
The Magic Mirror 6UUULegendary Artifact This spell costs {1} less to cast for each instant and sorcery card in your graveyard. You have no maximum hand size. At the beginning of your upkeep, put a knowledge counter on The Magic Mirror, then draw a card for each knowledge counter on The Magic Mirror.
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