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
Corrosion 1BREnchantment Cumulative upkeep {1} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.) At the beginning of your upkeep, put a rust counter on each artifact target opponent controls. Then destroy each artifact with mana value less than or equal to the number of rust counters on it. Artifacts destroyed this way can't be regenerated. When Corrosion leaves the battlefield, remove all rust counters from all permanents.
Ulrich, Uncontested Alpha Legendary Creature — Werewolf Whenever this creature transforms into Ulrich, Uncontested Alpha, you may have it fight target non-Werewolf creature you don't control. At the beginning of each upkeep, if a player cast two or more spells last turn, transform Ulrich, Uncontested Alpha. 6/6
Theater of Horrors 1BREnchantment At the beginning of your upkeep, exile the top card of your library. During your turn, if an opponent lost life this turn, you may play lands and cast spells from among cards exiled with Theater of Horrors. {3}{R}: Theater of Horrors deals 1 damage to target opponent or planeswalker.
Bortuk Bonerattle 4BGLegendary Creature — Troll Shaman Domain — When Bortuk Bonerattle enters the battlefield, if you cast it, choose target creature card in your graveyard. Return that card to the battlefield if its mana value is less than or equal to the number of basic land types among lands you control. Otherwise, put it into your hand. 4/4
Ray of Erasure UInstant Target player mills a card. Draw a card at the beginning of the next turn's upkeep.
Skittish Valesk 6RCreature — Beast At the beginning of your upkeep, flip a coin. If you lose the flip, turn Skittish Valesk face down. Morph {5}{R} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) 5/5
Extortion 3BBSorcery Look at target player's hand and choose up to two cards from it. That player discards those cards.
Natural Balance 2GGSorcery Each player who controls six or more lands chooses five lands they control and sacrifices the rest. Each player who controls four or fewer lands may search their library for up to X basic land cards and put them onto the battlefield, where X is five minus the number of lands they control. Then each player who searched their library this way shuffles.
Springjack Shepherd 3WCreature — Kithkin Wizard Chroma — When Springjack Shepherd enters the battlefield, create a 0/1 white Goat creature token for each white mana symbol in the mana costs of permanents you control. 1/2
Reckless Waif RCreature — Human Rogue Werewolf At the beginning of each upkeep, if no spells were cast last turn, transform Reckless Waif. 1/1
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