Dave and Adam's will not have phone hours on Friday, November 27th in observance of Thanksgiving.
Normal customer service hours will resume Monday, November 30th
Scars of Mirrodin - Poison Counter - 10x Lot
Poison counters are an alternate way of winning the game. This works when your opponent has ten (10) or more of them; and since they have no other properties, and rarely any other card affects or is affected by them, they do not hold much power in the metagame.