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
Fictional universe of Harry Potter of the sixth book. Pure-blood supremacists believe blood purity is a measure of a wizard's magical ability – notwithstanding examples of highly skilled Muggle-born witches and wizards such as Hermione Granger and Lily Evans - and less skilled pure-bloods such as Neville Longbottom (whose skills developed in "Deathly Hallows" due to his heroism) – and Muggles to be low-life, having no magic in them. Supremacists apply the term "blood traitor" to pure-bloods who harbor no prejudice against non-pure-bloods (enjoying their presence and relations with them). The hostile wizards and witches in the "Harry Potter" books are almost all supremacists, while