|"Are you a wizard or not?"
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Point wand at cauldron
Completes a potion
This spell is used throughout the process of brewing a potion, usually to complete it. It manifests as a white light, similar in appearance to lightning, which strikes the surface of the potion several times. Without this spell, no potion can be properly made, which is why Muggles cannot brew them.
Behind the scenes
- Despite J. K. Rowling claiming that every potion has a "magical component" and requires a wand at some stage, Pottermore and the related Wonderbook: Book of Potions are, as of currently, the only canon sources to depict this aspect of potion brewing.