|"Are you a wizard or not?"
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Leeks sprout from victim's ears
The leek jinx (incantation unknown) is a jinx that makes leeks sprout out of the target's ears.
In 1994, a fourth year Gryffindor and a sixth year Slytherin were sent to the hospital wing suffering from the effects of this jinx before the highly-charged atmosphere of the Gryffindor-Slytherin Quidditch match.