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The Backfiring Jinx (incantation unknown) was a jinx of unknown effect. In July 1996, the Office for the Detection and Confiscation of Counterfeit Defensive Spells and Protective Objects got wind of a "nasty" example of this jinx in Elephant and Castle, but it was sorted out by the Magical Law Enforcement Patrol before they arrived on the scene.[1]

Appearances

Notes and references

  1. Harry Potter and the Half-Blood Prince, Chapter 5 (An Excess of Phlegm)