The product is a 2021 Carddass Demon Slayer: Kimetsu No Yaiba Stained Glass Cards set, featuring characters such as Yushiro, Sanemi Shinazugawa, and Nezuko Kamado. These collectible cards are part of the Build Divide game and have a gold foil finish. The cards are based on the popular Demon Slayer anime and manga series, making them a valuable addition to any collector's deck. With speciality features like Infinity Castle and being part of the Union Arena card type, these cards are sure to enhance any gameplay experience.