S5·E26 The End of Tritannus

After finally managing to activate the Emperor's throne, Tritannus is losing control of his powers and himself, and even turns against Icy. One final showdown takes place between the Winx Club and Nereus to save the magical universe. In the end, Tritannus is defeated by Bloom and Nereus and banished to Oblivion for his actions. Bloom then made her Sirenix wish to break the Sirenix curse forever, thus restoring her big sister Daphne's physical body after so many years as a ghostly spirit.