"Ahem," Miss Parch moves on "Mister Symon, the wand you have been gifted with is called 'the Wand of Screams returned' it is actually a sluagh creation" she says with pride , not HER creation, but still, she's clearly glad a sluagh got it, "Such a title might sound damaging to you using it, but you will hear only a whisper at best. The object of your displeasure, however, will be bombarded by screams only they can hear, magnified thirteen fold. The power of the wand's screams will actually buffet them. Alas, it has but thirteen charges, and those restore only on Friday the 13ths or by finding one born on Friday the 13th and getting his or her blessing or well wish."