Winx Club Season 5 Episode 5 The Sirenix Book Episode Title:The Sirenix Book.Episode Description:Princess Krystal attempts to heal Sky's memory, but the memory of losing the pendant of Eraklyon is causing the blockage. Timmy helps Tecna update her phone to find the Sirenix Book, which the Trix secretly sabotage. When Tecna uses her cursed phone, the Winx find an ancient cursed book, which turns Tecna into a robot. The Winx find it difficult to stop her, but they manage to remove the phone from Tecna's chest and she is restored to normal, and the Winx find the Sirenix Book. Meanwhile, Nereus and Queen Ligea seek Tritannus and find him, but he turns Nereus into one of his mutant henchmen and threatens his mother to tell him about Sirenix. She tells him what little she knows, but unsatisfied, Tritannus angrily turned her into one of his mutant henchmen as well.