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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
Vildin-Pack Alpha Creature — Werewolf Whenever a Werewolf enters the battlefield under your control, you may transform it. At the beginning of each upkeep, if a player cast two or more spells last turn, transform Vildin-Pack Alpha. 4/3
Tourach's Chant 1BBEnchantment At the beginning of your upkeep, sacrifice Tourach's Chant unless you pay {B}. Whenever a player puts a Forest onto the battlefield, Tourach's Chant deals 3 damage to that player unless they put a -1/-1 counter on a creature they control.
Strength of the Tajuru XGGInstant Multikicker {1} (You may pay an additional {1} any number of times as you cast this spell.) Choose target creature, then choose another target creature for each time this spell was kicked. Put X +1/+1 counters on each of them.
Harmonious Emergence 3GEnchantment — Aura Enchant land you control Enchanted land is a 4/5 green Spirit creature with vigilance and haste. It's still a land. If enchanted land would be destroyed, instead sacrifice Harmonious Emergence and that land gains indestructible until end of turn.
Blinkmoth Urn 5Artifact At the beginning of each player's precombat main phase, if Blinkmoth Urn is untapped, that player adds {C} for each artifact they control.
A-Uurg, Spawn of Turg BBGLegendary Creature — Frog Beast A-Uurg, Spawn of Turg's power is equal to the number of land cards in your graveyard. At the beginning of your upkeep, surveil 2. {1}, Sacrifice a land: You gain 2 life. */5
Uurg, Spawn of Turg BBGLegendary Creature — Frog Beast Uurg, Spawn of Turg's power is equal to the number of land cards in your graveyard. At the beginning of your upkeep, surveil 1. (Look at the top card of your library. You may put that card into your graveyard.) {B}{G}, Sacrifice a land: You gain 2 life. */5
Spirit-Sister's Call 3WBEnchantment At the beginning of your end step, choose target permanent card in your graveyard. You may sacrifice a permanent that shares a card type with the chosen card. If you do, return the chosen card from your graveyard to the battlefield and it gains "If this permanent would leave the battlefield, exile it instead of putting it anywhere else."
Festering Wound 1BEnchantment — Aura Enchant creature At the beginning of your upkeep, you may put an infection counter on Festering Wound. At the beginning of the upkeep of enchanted creature's controller, Festering Wound deals X damage to that player, where X is the number of infection counters on Festering Wound.
Raggadragga, Goreguts Boss 2RGLegendary Creature — Human Boar Each creature you control with a mana ability gets +2/+2. Whenever a creature you control with a mana ability attacks, untap it. Whenever you cast a spell, if at least seven mana was spent to cast it, untap target creature. It gets +7/+7 and gains trample until end of turn. 4/4
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