Forget modern home security systems - I know a spell that works even better! Which protective charm warns of intruders in an area by letting out a high-pitched shriek?

Nothing can put worries to rest quite like the Caterwauling Charm! When cast, any unauthorized person entering the affected area will set off a particularly shrill alarm. Harry, Ron, and Hermione accidentally set off this charm, which was set by Death Eaters, in the Deathly Hallows.

Asked by Rachel Bortles · Last updated 5 years ago · 10.5K views · SOURCE