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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
Ramosian Rally 3WInstant If you control a Plains, you may tap an untapped creature you control rather than pay this spell's mana cost. Creatures you control get +1/+1 until end of turn.
Aleatory 1RInstant Cast this spell only during combat after blockers are declared. Flip a coin. If you win the flip, target creature gets +1/+1 until end of turn. Draw a card at the beginning of the next turn's upkeep.
Ring of Valkas 2Artifact — Equipment Equipped creature has haste. (It can attack and {T} no matter when it came under your control.) At the beginning of your upkeep, put a +1/+1 counter on equipped creature if it's red. Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)
Cleansing WWWSorcery For each land, destroy that land unless any player pays 1 life.
Chimeric Idol 3Artifact {0}: Tap all lands you control. Chimeric Idol becomes a 3/3 Turtle artifact creature until end of turn.
Uba Mask 4Artifact If a player would draw a card, that player exiles that card face up instead. Each player may play lands and cast spells from among cards they exiled with Uba Mask this turn.
Rime Dryad GCreature — Dryad Snow forestwalk (This creature can't be blocked as long as defending player controls a snow Forest.) 1/2
Barrow Ghoul 1BCreature — Zombie At the beginning of your upkeep, sacrifice Barrow Ghoul unless you exile the top creature card of your graveyard. 4/4
Phosphorescent Feast 2GGGSorcery Chroma — Reveal any number of cards in your hand. You gain 2 life for each green mana symbol in those cards' mana costs.
Ring of Kalonia 2Artifact — Equipment Equipped creature has trample. (It can deal excess combat damage to the player or planeswalker it's attacking.) At the beginning of your upkeep, put a +1/+1 counter on equipped creature if it's green. Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)
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