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Causes fur to grow on someone.
- "Ginny Weasley, who sat next to Colin Creevey in Charms, was distraught, but Harry felt that Fred and George were going the wrong way about cheering her up. They were taking turns covering themselves with fur or boils and jumping out at her from behind statues."
This spell (incantation unknown) causes fur to grow on someone. Fred and George Weasley used this spell on themselves to grow fur (along with boils), in an attempt to cheer up their sister, Ginny Weasley during the time when Salazar Slytherin's basilisk was petrifying students.