https://www.nuget.org/packages/Polyjuice
Polyjuice Potion is a potion that allows the drinker to assume the form of someone else.
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https://www.inverse.com/entertainment/25600-grindelwald-polyjuice-percival-graves
The American wizard Percival Graves never existed, and this key detail puts the events of 'Fantastic Beasts and Where to Find Them' in a whole new light.
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