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Polyjuice Potion. It is used for transformation to look like someone else. It tastes awful and needs to ferment for something like 30 days and the final ingredient is a hair from the person you want to look like, but unfortunately Hermione took a cat hair instead of a human hair and was transformed partially into a cat.
He turned into Vincent Crabbe.
You need to find all the ingredients (hair, apple, cherry) and put them in a gold cauldron.
Hermione used Polyjuice Potion to transform into Bellatrix Lestrange in Harry Potter 7.
Hermione doesn't turn into a person after drinking the Polyjuice Potion. She accidentally used cat hair instead of the human hair she meant to use (Millicent Bullstrode). She turns into a sort of half cat/half human. She has black fur, yellow eyes, whiskers, cat ears, and a tail, but she also has a human-shaped body and can talk still. (In the movie, she had orange fur).
In Harry Potter and the Chamber of Secrets, Harry, Ron, and Hermione use the Polyjuice potion in order to appear as Vincent Crabbe and Gregory Goyle so that they could infiltrate the Slytherin common room and talk to Draco Malfoy. Hermione has accidentally used the hair of a cat instead of Milicent Bulstrode.
I think you mean disapparating hope i spelled it right :D
it wasn't a spell but rather a large amount of Sleekeazy's Hair Potion
Yes, sort of. She used a dose of polyjuice potion to impersonate Bellatrix Lestrange. She did not actually become a Death Eater herself.
She, as well as the other students, made many different potions during Potions Class. However, the one she was known for making outside of class in Chamber of Secrets was the Polyjuice Potion.
Bartemius (Barty) Crouch jr. used the Polyjuice potion to become Mad Eye Moody and taught Defence against the Dark Arts as him
Harry and Ron went into Slytherin Common room to see Draco Malfoy, disguised as Crabbe and Goyle through Polyjuice potion, to question him secretly if he was the Heir of Slytherin. Hermione stayed behind in the toilets because she accidentally used a cat hair for her potion, and it turned her face into a cat. Hermione was supposed to be disguised as Pansy Parkinson.