Official Harry Potter Mirror of Erised Keyring. Erised is desire spelt backwards, its a magical mirror which reflects the desires of your heart. And if your desire is to keep your keys safe, our keyring will do the job perfectly! The keyring has been created using the official style guide from Warner Bros and come on official branded packaging with the Warner Bros logo. The Carat Shop are the official licensed manufacturers of Harry Potter Jewellery on behalf of Warner Bros.