 | | Card name : | Hall of Gemstone | | Mana Cost : |   | | Types : | World Enchantment | | Card Text : | 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. | | | | | Expansion : |  Mirage | | Rarity : | Rare |
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