Unless you wish to poison him...

That's Moody. But then who's...?

A bezoar is a stone taken from the stomach of a goat and it will save you from most poisons.

Three drops of this and You-Know-Who himself would spill his darkest secrets.

- Who's Moaning Myrtle? - I'm Moaning Myrtle.

All your fear-mongering about You-Know-Who...

Say, Percy, who's that teacher talking to Professor Quirrell?

...who tries to read it. I suspect it's a Zonko product.

An Animagus is a wizard who elects to turn into an animal.

The blood that runs through these veins runs within the Dark Lord.

Earlier today, Professor Moody placed the Triwizard Cup deep within the maze.

Augustus Rookwood? Of the Department of Mysteries?

Put your hands up in the air

I want to see the light leave your eyes!

Congratulations, your performance in the Black Lake was inspiring.

The use of it on a student is, regrettably, forbidden. However...

However, if we are to truly discover the meaning of these events...

I will not have you, in the course of a single evening, besmirching that name...

Astonishing what a few drops of your blood will do, eh, Harry?

Cedric, he asked me to bring his body back.