Muggleshop - Harry Potter Merchandise

Pull out your Marauder's Map and explore the secret halls of Hogwarts while wearing this Adult black Harry Potter "I Solemnly Swear" t-shirt. This t-shirt was created by WBShop.com for the most dedicated Harry Potter fans. The shirt features the password to opening the secrets of the map on front - "I solemnly swear that I am up to no good" and the secret to close the map - "Mischief Managed" - on back. 100% cotton.

Purchase from Warner Brothers Shop for $18.95

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