Hermione Granger is crucial to Harry and Ron in their successful mission to solve the mystery of the Chamber of Secrets. Hermione is revived after Harry kills the basilisk, but she is distraught to learn that all end-of-year exams have been cancelled as a school treat. Hermione buys a cat named Crookshanks, who takes to chasing Ron's pet rat, Scabbers. Before the start of term, Professor McGonagall secretly gives Hermione a Time-Turner, a device which enables her to go back in time and handle her heavy class schedule, though this is not revealed until the penultimate chapter. Much tension comes into play
Harry Potter and the Deathly Hallows – Part 1 addresses the wizarding media, stating that the Ministry remains strong despite Lord Voldemort gaining power and the Death Eaters committing mass killings of Muggles and infiltrating the Ministry. Meanwhile, Harry Potter, Ron Weasley, and Hermione Granger resolve to complete the mission Albus Dumbledore gave Harry by hunting down and destroying Voldemort's Horcruxes. Severus Snape informs Voldemort of Harry's impending departure from Privet Drive. Voldemort commandeers Lucius Malfoy's wand, due to his own wand sharing the same core as Harry's and therefore being unable to kill him. The Order of the Phoenix escort Harry to safety using Polyjuice Potion. During their