Harry Potter (Wizardry) Magnet Set- Official Harry Potter Merchandsie. Harry Potter - Wizardry - 21 pieces Bring a little magic to your four walls with our 'Wizardry' fridge magnets. They come straight from the world of Harry Potter and depict typical motif such as Harry's address in the Muggle world, the Sorting Hat and the Hogwarts crest. The set includes 21 magical magnets.