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
Officious Interrogation WUInstant This spell costs {W}{U} more to cast for each target beyond the first. Choose any number of target players. Investigate X times, where X is the total number of creatures those players control.
Molten Collapse BRSorcery Choose one. If you descended this turn, you may choose both instead. (You descended if a permanent card was put into your graveyard from anywhere.) • Destroy target creature or planeswalker. • Destroy target noncreature, nonland permanent with mana value 1 or less.
Well of Discovery 6Artifact At the beginning of your end step, if you control no untapped lands, draw a card.
Crown of Awe 1WEnchantment — Aura Enchant creature Enchanted creature has protection from black and from red. Sacrifice Crown of Awe: Enchanted creature and other creatures that share a creature type with it gain protection from black and from red until end of turn.
Frenzied Tilling 3RGSorcery Destroy target land. Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.
Visions of Dread 2BSorcery Target opponent puts a creature card of their choice from their graveyard onto the battlefield under your control. Flashback {8}{B}{B}. This spell costs {X} less to cast this way, where X is the greatest mana value of a commander you own on the battlefield or in the command zone. (You may cast this card from your graveyard for its flashback cost. Then exile it.)
Mirage Mirror 3Artifact {2}: Mirage Mirror becomes a copy of target artifact, creature, enchantment, or land until end of turn.
Nocturnal Raid 2BBInstant Black creatures get +2/+0 until end of turn.
Sibling Rivalry 3RSorcery Gain control of target artifact or creature until end of turn. Untap it. It gains haste until end of turn. Create a tapped Powerstone token. (It's an artifact with "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.")
Stone Giant 2RRCreature — Giant {T}: Target creature you control with toughness less than Stone Giant's power gains flying until end of turn. Destroy that creature at the beginning of the next end step. 3/4
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