Harry Potter Cameos and Easter Eggs in Crimes of Grindelwald
The Biggest Harry Potter Easter Eggs Hidden in Fantastic Beasts: The Crimes of Grindelwald
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At the very end of the film, a certain someone is revealed to be a member of the Dumbledore family. Because of that, they're able to call forth a mythical phoenix, just like the one Albus Dumbledore has by his side throughout Harry Potter's time at Hogwarts.