Searching for Neville's Toad
*Hoping this hasn't already been asked*
I'm a little confused about the whole concept of Dark Magic.
I'm assuming that the following are examples of Dark Magic:
The potion that had to be drunk to get the locket Horcrux
The necklace that Katie Bell touched
But what makes something 'Dark'? A definition of Dark Magic would be awesome.
And plenty of examples, if possible.
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