Winx Club: Beyond Believix: Season 1, Episode 5
The Sirenix Book (Sep. 2012)
TV Episode -
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The Winx use Tecna's tech-savvy skills to find the Sirenix Book, but the Trix meddle with the Winx' search. When Tritannus learns of the Winx' mission to achieve Sirenix, he too, seeks to obtain it.