Victory is certain. The price, negotiable.
217 KTK • ENSteve Argyle
™ & © 1993—2014 Wizards of the Coast
Legal in: Modern,Khans of Tarkir Block,Legacy,Vintage,Commander
Oracle Text (click to copy):
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9/20/2014 Activating the ability targeting a creature that’s already attacking or blocking won’t remove it from combat or affect that attack or block. 9/20/2014 If Briber’s Purse has no gem counters on it, it remains on the battlefield, although you can’t activate its last ability.