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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
Horribly Awry 1UInstant Devoid (This card has no color.) Counter target creature spell with mana value 4 or less. If that spell is countered this way, exile it instead of putting it into its owner's graveyard.
Vorinclex, Monstrous Raider 4GGLegendary Creature — Phyrexian Praetor Trample, haste If you would put one or more counters on a permanent or player, put twice that many of each of those kinds of counters on that permanent or player instead. If an opponent would put one or more counters on a permanent or player, they put half that many of each of those kinds of counters on that permanent or player instead, rounded down. 6/6
Mishra's Foundry Land {T}: Add {C}. {2}: Mishra's Foundry becomes a 2/2 Assembly-Worker artifact creature until end of turn. It's still a land. {1}, {T}: Target attacking Assembly-Worker gets +2/+2 until end of turn.
Nettlevine Blight 4BBEnchantment — Aura Enchant creature or land Enchanted permanent has "At the beginning of your end step, sacrifice this permanent and attach Nettlevine Blight to a creature or land you control."
Spore Burst 3GSorcery Domain — Create a 1/1 green Saproling creature token for each basic land type among lands you control.
Oglor, Devoted Assistant 1ULegendary Creature — Homunculus At the beginning of your upkeep, look at the top two cards of your library, then put one of them into your graveyard. Whenever a creature card is put into your graveyard from your library or hand, it perpetually gains "When this card leaves your graveyard, create a tapped 2/2 black Zombie creature token." 1/1
Chartooth Cougar 5RCreature — Cat Beast {R}: Chartooth Cougar gets +1/+0 until end of turn. Mountaincycling {2} ({2}, Discard this card: Search your library for a Mountain card, reveal it, put it into your hand, then shuffle.) 4/4
Tenuous Truce 1WEnchantment — Aura Enchant opponent At the beginning of enchanted opponent's end step, you and that player each draw a card. When you attack enchanted opponent or a planeswalker they control or when they attack you or a planeswalker you control, sacrifice Tenuous Truce.
Thrasios, Triton Hero GULegendary Creature — Merfolk Wizard {4}: Scry 1, then reveal the top card of your library. If it's a land card, put it onto the battlefield tapped. Otherwise, draw a card. Partner (You can have two commanders if both have partner.) 1/3
Feed the Cauldron 2BInstant Destroy target creature with mana value 3 or less. If it's your turn, create a Food token. (It's an artifact with "{2}, {T}, Sacrifice this artifact: You gain 3 life.")
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