This is a curse, that was used by the Dark Wizard Gellert Grindelwald against Newt Scamander in the New York City Subway in 1926, during the Obscurus attack on New York. It manifests itself in the form of a bolt of white lightning. It is very painful to be struck with, as Grindelwald used it to torture Newt Scamander upon overpowering him, and potentially deadly.[1]


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