Gemstone Mine enters the battlefield with three mining counters on it. , Remove a mining counter from Gemstone Mine: Add one mana of any color to your mana pool. If there are no mining counters on Gemstone Mine, sacrifice it.
119 TSB • ENBrom
™ & © 1993—2006 Wizards of the Coast
Legal in: Modern,Time Spiral Block,Mirage Block,Legacy,Vintage,Freeform,Prismatic,Tribal Wars Legacy,Singleton 100,Commander
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10/4/2004 Sacrificing this card when the last counter is removed is part of the effect of tapping it for mana. 9/25/2006 If the last mining counter is removed from Gemstone Mine in some way other than activating its ability (such as Chisei, Heart of Oceans), Gemstone Mine won't be sacrificed but its ability can't be activated.