Castle Panic: Crossbow promo

This coaster is a promo item released in 2012. The coaster depicts a crossbow and the following text on the reverse side: This coaster allows a Knight or Swordsman to hit a flying monster. Once per game, play this coaster WITH a Knight card to hit a Flying Monster in the Knight ring or with a Swordsman card to hit a Flying Monster in the Swordsman ring. The total damage is 1 point.