S5·E23 The Shark's Eye

Bloom learns the story of Daphne and Politea and how they were cursed by the Ancestral Witches. To protect her friends from the Sirenix curse, Bloom and Serena go on a mission to find the Shark's Head, where Politea lives. However, they and Icy fall behind when Darcy and Stormy drain Politea of her Sirenix powers.