Hall of Gemstone

Enchant World    (CMC:3)

During each player's upkeep, that player chooses a color. Until end of turn, each mana-producing land produces mana of the chosen color instead of its normal color.

MI • ENDavid A. Cherry

™ & © 1993—1996 Wizards of the Coast

Legal in: Mirage Block,Legacy,Vintage,Freeform,Prismatic,Tribal Wars Legacy,Singleton 100,Commander

Oracle Text (click to copy):

Hall of Gemstone {1}{G}{G} 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.

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10/4/2004
Although the color may be altered, any restrictions on the use of the mana are not removed.
10/4/2004
Will not affect lands that do not produce mana.
10/1/2008
This has the supertype world. When a world permanent enters the battlefield, any world permanents that were already on the battlefield are put into their owners' graveyards. This is a state-based action called the "world rule." The new world permanent stays on the battlefield. If two world permanents enter the battlefield at the same time, they're both put into their owners' graveyards.

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