|"Are you a wizard or not?"
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- "Ron had caused a dinner plate to mutate into a large mushroom and had no idea how it had happened."
- —On Ron's use during his Charms O.W.L[src]
This spell is used to transform a dinner plate into a large mushroom. During Ronald Weasley's Charms Ordinary Wizarding Level in Transfiguration, he somehow managed to use this spell, instead of the charm he was supposed to have been performing, and had no idea how he'd done it.