Hall of Gemstone
Casting Cost: 
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.
| Edition: |
Mirage |
| Type: |
World Enchantment |
| Rarity: |
Rare |
| P/T: |
|
| Artist: |
David A. Cherry |
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