One of the most powerful defence spells in the entire of the Wizarding World, by casting the charm "Expecto Patronum", it invokes a beautiful, magical spirit guide in the shape of an animal guardian. For Harry, Lilly and James Potter it is deer. For Ron Weasley, a Jack Russell Terrier and for Hermione Granger, an otter. What will yours be? Raise you wand and find out! This officially licensed t-shirt is ideal for casual wearing with a regular fit throughout.