Card Codex

M:tG card similarity search

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
Court of Locthwain 2BBEnchantment When Court of Locthwain enters the battlefield, you become the monarch. At the beginning of your upkeep, exile the top card of target opponent's library. You may play that card for as long as it remains exiled, and mana of any type can be spent to cast it. If you're the monarch, until end of turn, you may cast a spell from among cards exiled with Court of Locthwain without paying its mana cost.
Sleeper Agent BCreature — Phyrexian Minion When Sleeper Agent enters the battlefield, target opponent gains control of it. At the beginning of your upkeep, Sleeper Agent deals 2 damage to you. 3/3
Gray Merchant of Alphabet 3BBCreature — Zombie Performer When Gray Merchant of Alphabet enters the battlefield, choose a letter. For each creature you control that has the chosen letter in its name, you gain 1 life and each opponent loses 1 life. 2/4
Gulf Squid 3UCreature — Squid Beast When Gulf Squid enters the battlefield, tap all lands target player controls. 2/2
Coercion 2BSorcery Target opponent reveals their hand. You choose a card from it. That player discards that card.
Darba 3GCreature — Bird Beast At the beginning of your upkeep, sacrifice Darba unless you pay {G}{G}. 5/4
Phobian Phantasm 1BBCreature — Illusion Flying; fear (This creature can't be blocked except by artifact creatures and/or black creatures.) Cumulative upkeep {B} (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.) 3/3
Rohgahh of Kher Keep 2BBRRLegendary Creature — Kobold At the beginning of your upkeep, you may pay {R}{R}{R}. If you don't, tap Rohgahh of Kher Keep and all creatures named Kobolds of Kher Keep, then an opponent gains control of them. Creatures you control named Kobolds of Kher Keep get +2/+2. 5/5
Curse of Thirst 4BEnchantment — Aura Curse Enchant player At the beginning of enchanted player's upkeep, Curse of Thirst deals damage to that player equal to the number of Curses attached to them.
Damping Engine 4Artifact A player who controls more permanents than each other player can't play lands or cast artifact, creature, or enchantment spells. That player may sacrifice a permanent for that player to ignore this effect until end of turn.
Page 148