Winx Club, Season 5

Bloom:
The things is that our Believix powers seem to work well underwater.

Faragonda:
Your powers as Believix fairies are great. But far from land and the worlds of water. They are less...effective.

Flora:
But Tritannus is strong.

Aisha:
And getting stronger.

Bloom:
How are we going to stop him?

Faragonda:
There is one way. You must try to acquire Sirenix.

Stella:
Great. Just when I thought we were done.

Faragonda:
Sirenix is an ancient power, born of the magic of the oceans. It will make you strong to defeat Tritannus. But no one has become a Sirenix fairy for quite some time.

Bloom:
Then how do we acquire the power? Become Sirenix fairies?

Faragonda:
You must start by finding the ancient book of Sirenix. But that will a great challenge, for it is hidden and I do not know where. However, I do knows its hiding place. Bloom, you must ask your sister Daphne. She was the last fairy to acquire Sirenix. Only she can tell you.