Acheron and Selina in “Unfinished Business”

Selina, you must work harder.

Huh?

You must stop the Winx from finding the dairy. If you don't, I could be locked in the Legendarium forever.

But, Acheron, I don't know where the diary is.

I do. I've had plenty of time to spy on the fairy godmother all these years.

Hmm.

So I will teleport you to where she hid the dairy. It is deep in the heart of the library, in a secret hidden chamber.