- Art Shift: When the Winx are in the Infinite Ocean, everything is in CGI.
- Big "NO!": By Daphne as Tritannus steals her Sirenix.
- But Now I Must Go: The Sirenix Book vanishes upon explaining that the gems were collected but the Source of Sirenix still has to be found. The Winx were not too happy at this, especially Stella.
- Celestial Deadline: It turns out The Sirenix Quest was not yet over; the Winx have until sunset to find the Source of Sirenix, since thats when the lunar cycle ends and theyll lose their powers forever.
- Eureka Moment: Bloom has one, realizing the Sirenix Books riddle as she contacts her Guardian, who tells her to go to the place where the quest began, making her realize Lake Roccaluce is where the Source of Sirenix can be activated.
- Moral Dilemma: Bloom is stuck between two decisions: Either save Lake Roccaluce from drying up or tell Tritannus where Daphne is located. Ultimately, Bloom decides to restore Lake Roccaluce but not before stating to Tritannus that their fight is far from over.
- Power Dyes Your Hair: For some reason, the Winx's hair changes color in Sirenix, but only when they are underwater.
- Wham Episode: The Winx finish the Sirenix Quest, entering the Infinite Ocean and becoming Sirenix fairies.
- Where It All Began: To find the source of Sirenix and officially complete the Sirenix Quest, the Winx have to go to the place where their journey began, which turns out to be Lake Roccaluce.
Recap / Winx Club S 5 E 13 Sirenix