Weiss Schwarz - Sleeping Knights Yuuki - SAO/SE26-E13 - C (SAO/SE26-E13) - Sword Art Online II Vol. 2 Extra Booster A single individual card from the Weiss Schwarz trading and collectible card game (TCG/CCG). This is of C rarity. From the Sword Art Online II Vol. 2 Extra Booster set.