The Brilliant Buckbeak is an event Foundable in Harry Potter: Wizards Unite and can be found in the Brilliant Event: Fantastic Flora and Fauna registry.
Summary
After fleeing from an unjust execution with the help of Harry Potter, Buckbeak went on the run with the fugitive Sirius Black. Following Black's death, Buckbeak - rechristened 'Witherwings' to avoid further prosecution - rejoined the Hippogriff herd at Hogwarts.
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