The Philosopher's Stone.

And trust me, if Snape's cloak hadn't caught fire and broken my eye contact...

- What is this magic? - Fool, get the Stone!

- What happened to the Stone? - Relax, dear boy.

How is it I got the Stone, sir?

At the end of the year, the house with the most points is awarded the house cup.

powerful it is known as the Draught of the Living Dead.

...gives a student the right to walk about the school at night.

And the points stand thus:

The Sorting Ceremony will begin momentarily.

Does that mean, with the Stone gone that is, that Voldemort can never come back?

Wait a minute. "One of the teachers"?

We go down the trap door. Tonight.

As for monkshood and wolfsbane, they are the same plant, which also goes by the name of aconite.

You catch it. Before the other team's Seeker.

...prefects will lead their house back to the dormitories.

That's what the dog's guarding. That's what Snape wants.

Now, don't forget the nice wrist movement we've been practicing.

Once I make my move, the queen will take me.

I'm shaking hands with Dumbledore. I've won the house cup.