After being abandoned by Ron and Hermione during their Horcrux hunt, a despondent Harry seeks refuge in the muggle world and stumbles upon a mysterious card shop called Mystic Deck. Drawn to a pack of cards labeled "Sacred Beasts," Harry purchases them and asks Kane, the enigmatic shopkeeper, how to play. Kane introduces Harry to the world of Duel Monsters, even guiding him through his first duel in the shop's backroom. Impressed by Harry's latent potential, Chancellor Sheppard hands him a brochure for Duel Academy, a prestigious school dedicated to mastering the game, and urges him to consider attending. As Harry leaves the shop, torn between his mission against Voldemort and this intriguing new path, he's faced with a life-changing decision.