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 Hall of Gemstone | |
|---|---|
| Mana cost |   |
| Mana value | 3 |
| Type | World Enchantment |
| Power / Toughness | — |
| Rarity | Rare |
| Price | $14.35 |
| Rules 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. |