Hogwarts Card Maker

After transmigrating into the Olivander family as its only grandson, Gavin Olivander never inherited the wand-making trade. All he had in his head was an illusion that taught him to make cards, over and over. The wizarding world had no card machines or card ink, and he even had to make the blank cards himself. He replaced the materials in the shop one by one, and after six years, he crafted his first usable card. The “traitor” of a wand-making family? He just wants everyone in the wizarding world to use his cards.