|"Are you a wizard or not?"
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- "Harry had already attempted a few of the Prince's self-invented spells. There had been a hex that caused toenails to grow alarmingly fast "
The Toenail-growing hex (incantation unknown) is used to cause the victim's toenails to grow at an alarmingly fast rate.
This hex was invented by Severus Snape and recorded in his copy of Advanced Potion-Making during his school years at Hogwarts School of Witchcraft and Wizardry. Therefore, it had not been approved by the Ministry of Magic.
Behind the scenes
- It is unknown when Severus Snape invented this and many of his other spells as according to Sirius Black "he knew more curses when he arrived at school than half the kids in seventh year."