Hall of Gemstone
World Enchantment
Mirage (MIR) · rare
Oracle 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.
World Enchantment
Mirage (MIR) · rare
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.