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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
You're in Command 1WSorcery Choose target creature you own and control. That creature becomes your commander. Any other commanders you have are no longer your commander. (That creature starts with a commander tax of {0}.)
Untaidake, the Cloud Keeper Legendary Land Untaidake, the Cloud Keeper enters the battlefield tapped. {T}, Pay 2 life: Add {C}{C}. Spend this mana only to cast legendary spells.
Gideon's Intervention 2WWEnchantment As Gideon's Intervention enters the battlefield, choose a card name. Your opponents can't cast spells with the chosen name. Prevent all damage that would be dealt to you and permanents you control by sources with the chosen name.
Cultural Exchange 4UUSorcery Choose any number of creatures target player controls. Choose the same number of creatures another target player controls. Those players exchange control of those creatures. (This effect lasts indefinitely.)
Midnight Crusader Shuttle 4Artifact — Vehicle Midnight Entity — Whenever Midnight Crusader Shuttle attacks, defending player faces a villainous choice — That player sacrifices a creature, or you gain control of a creature of your choice that player controls until end of turn. If you gain control of a creature this way, tap it, and it's attacking that player. Crew 2 3/4
Barren Glory 4WWEnchantment At the beginning of your upkeep, if you control no permanents other than Barren Glory and have no cards in hand, you win the game.
Essence Leak UEnchantment — Aura Enchant permanent As long as enchanted permanent is red or green, it has "At the beginning of your upkeep, sacrifice this permanent unless you pay its mana cost."
Feral Instinct 1GInstant Target creature gets +1/+1 until end of turn. Draw a card at the beginning of the next turn's upkeep.
Fevered Strength 2BInstant Target creature gets +2/+0 until end of turn. Draw a card at the beginning of the next turn's upkeep.
Gibbering Descent 4BBEnchantment At the beginning of each player's upkeep, that player loses 1 life and discards a card. Hellbent — Skip your upkeep step if you have no cards in hand. Madness {2}{B}{B} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)
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