Winx Club, Season 6

Faragonda:
Winx, we have reason to believe that the Trix are in possession of an extremely powerful and dangerous book. It is called the Legendarium.

Bloom:
So all those monsters who attacked us...

Daphne:
Were brought to life by the Legendarium.

Aisha:
Then what are we waiting for? We need to destroy the Legendarium.

Faragonda:
I'm afraid you already tried to do just that, Aisha, without even knowing it.

Bloom:
That's why the negative energy was so powerful.

Faragonda:
The Legendarium is indestructible. We must find a way to lock it forever.

Daphne:
Especially since it is in the wrong hands, but it wasn't always that way. The Legendarium used to reside in the lost library of Alexandria in Egypt. A fairy godmother, who guarded the book, is the only one who knows how to lock it. From what I've read so far, the fairy godmother kept a diary containing all the secrets of the Legendarium.