The Trix summon the Beast of the Depths and unleash it on Daphne's welcome home party, and the Winx are powerless against it.

It's Daphne's first day as the new History of Magic teacher. At Cloud Tower, a witch named Selina wields an evil book known as the Legendarium.

With most of the Winx rendered powerless, the Trix take over Lynphea. Daphne looks for a way to control the Treants, but then a new threat emerges.

While Daphne brings her class to visit the Golden Auditorium, Selina unleashes the screaming Pandemonium Sprites upon the prestigious music college.

The kingdom celebrates the joyous occasion of Daphne's princess coronation, but Diaspro is also in attendance, and she's up to no good.

After learning about the Legendarium, the Winx travel to the Lost Library of Alexandria so the indestructible book can be locked away for good.

Selina awakens the Sphinx and unleashes it upon the whole city of Alexandria, causing the Winx to halt their search for the Fairy Godmother's diary.

The Winx's search for Fairy Godmother Eldora leads them to China. After an attack by the Trix, they meet Lu Wei, the last dragon tamer.

While asking Professor Palladium about their rare flower, the Winx learn that a fairy by the name of Eldora once taught Floral Magic there in Alfea.

While alone on Earth back home in the town of Gardenia, Bloom realizes that Eldora could be nearby. Meanwhile, vampires have infiltrated the area.

Selina sends the Children of the Night to attack Bloom, but the Winx show up to help her fight them off. Bloom realizes she still needs her friends.

Bloom brings the Winx to the Forest of Flowers, where she remembers seeing the mysterious flower as a child while playing with her old friend, Selina.

The Winx head to Tir Nan Og, where Eldora says they can find an item that once belonged to the Legendarium World.

To forge the Legendarium Key, the Winx and the Specialists search for the Fantasy Emerald on the sun-drenched Calavera Island.

The zombie pirates put up a big fight, but the Winx have to find the Fantasy Emerald quick, or they'll get stuck in the Legendarium World forever.

Next, the Winx must retrieve the Silver Spear, said to be hidden in a forest town on Earth where werewolves roam after dark.

Flora finds the totem in the Legendarium World and brings it back to Fearwood to break the curse gripping the town's residents.

With the Legendarium Key forged and in their hands, the Winx head to Cloud Tower to lock the Legendarium, but Selina is determined to stop them.

After being queen for a day, Stella has to show everyone she's hurt that she's sorry, and her friends help her throw a party to do just that.

To locate Cloud Tower, the Winx need a way to make it visible again. A Spectographic Localizer would work, but they'll need to find one first.

Musa opens a music cafe, and the magical energy it emanates provides much-needed protection for Alfea -- but then Musa's voice is stolen!

The Winx need to get Musa's voice back from Rumpelstiltskin, but he demands something from them that they're not prepared to give.

In a duel, Bloom goes up against her childhood friend Selina, who needs a spark of Bloom's Dragon Flame to finally free Acheron from the Legendarium.

Daphne makes a big announcement: She's getting married to Thoren! But back in Cloud Tower, Selina successfully frees the evil Acheron into the world.

Thanks to the defeat of Acheron, Selina manages to get her powers back. It will be up to her to lock the Legendarium once and for all.