A Wedge Counter (楔（くさび）カウンター Kusabi Kauntā) is a type of counter used exclusively by the Synchro Monster "Blackwing Armor Master". It can be removed from a monster to reduce that monster's ATK and DEF to 0 until the end of the turn. There can be only be a maximum of one Wedge Counter on a monster. Wedge Counters are the first counters to be represented by official cards.