(..) The torture curse. Crucio! Stop it! Can't you see it's bothering him? Stop it! Perhaps you could give us the last Unforgivable Curse, Miss Granger. No? Avada Kedavra! The Killing Curse. Only one person is known to have survived it... (..)

(..) End of story, goodbye, the end. Any questions? When it comes to the Dark Arts... ...I believe in a practical approach. But first, which of you can tell me how many Unforgivable Curses there are? - Three, sir. - And they are so named? Because they are unforgivable. The use of any one of them will... (..)