Khác biệt giữa bản sửa đổi của “Muggles' Guide to Harry Potter/Magic/Expecto Patronum”
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Dòng 15:
[[Muggles' Guide to Harry Potter/Characters/Harry Potter|Harry]] learns this spell from [[Muggles' Guide to Harry Potter/Characters/Remus Lupin|Remus Lupin]] in [[Muggles' Guide to Harry Potter/Books/Prisoner of Azkaban/Chapter 12|''Harry Potter and the Prisoner of Azkaban'']]. Harry's ability to cast a corporeal Patronus in his third year of magical studies shows his ability as a wizard, as it is a very advanced spell which is thought to be too difficult for underage wizards. In his fifth year, when Harry takes his [[Muggles' Guide to Harry Potter/Major Events/OWL exams|OWLs]], his Charms examiner offers him an extra point if he can produce a corporeal Patronus. A point, or a letter grade, would be worth about 15% of his total marks, so achieving this one charm is seen as quite valuable.
The primary purpose of the Patronus, as mentioned, is as defence against Dementors. Professor Lupin describes it thus: "... a kind of anti-Dementor – a guardian which acts as a shield between you and the Dementor." And: "The Patronus is a kind of positive force, a projection of the very things that the Dementor feeds upon – hope, happiness, the desire to survive – but it cannot feel despair, as real humans can, so Dementors can't hurt it." Presumably, the Dementor, finding that the being confronting it does not suffer as a human would, retreats in confusion.
We also see the Patronus used as a
The shape of a corporeal Patronus is significantly influenced by the personality of the caster. Harry's is a stag; Dumbledore's is a phoenix; Tonks, in ''Harry Potter and the Half-Blood Prince'', is "something large and hairy", and has apparently changed recently. Members of Dumbledore's Army are also, some of them, able to conjure Patronuses by their last lesson: [[Muggles' Guide to Harry Potter/Characters/Cho Chang|Cho Chang]]'s is a swan, for instance, while [[Muggles' Guide to Harry Potter/Characters/Hermione Granger|Hermione]]'s is an otter. Life events can change the shape of a Patronus as well; as mentioned, [[Muggles' Guide to Harry Potter/Characters/Severus Snape|Professor Snape]] mentions that Tonks' Patronus had changed. This change apparently happened at the death of [[Muggles' Guide to Harry Potter/Characters/Sirius Black|Sirius Black]], and Harry initially thinks that Tonks' new Patronus has taken on Sirius' dog shape.
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