A device used by Hermione to take extra classes, which later saves Sirius and Buckbeak.
Harry discovers that Sirius was his father’s best friend and is actually innocent. Harry Potter and the Prisoner of Azkaban
A difficult charm that conjures a silver guardian to repel Dementors. Harry’s Patronus is a stag. 🎬 Fun Facts & Trivia A device used by Hermione to take extra