Hall of Gemstone

one generic mana one green mana 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.

Add to list

Showing Mirage#221

Price

13.75 $

8 printings

Daily estimate from Scryfall, not a shop quote.

View onScryfall EDHREC

Buy this printingTCGplayer Cardmarket Cardhoarder

Hall of Gemstone rulings

2016-08-23
Any colorless mana that's produced isn't affected.
2008-10-01
This has the supertype world. When a world permanent enters, 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 at the same time, they're both put into their owners' graveyards.
2004-10-04
Although the color may be altered, any restrictions on the use of the mana are not removed.
2004-10-04
Will not affect lands that do not produce mana.