Faragonda, Bloom and others in “Unfinished Business”

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.

So all those monsters who attacked us...

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.

That's why the negative energy was so powerful.

Faragonda

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

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.