Acheron. The Winx prepare the wedding for Daphne and Thoren, but while preparing, they discover that Selina has freed Acheron. However, he betrays Selina and her loyalty, then sends the Trix into the Legendarium World forever. With the power of the Dragon Flame, Acheron begins to reign over all the magic in the dimension. By Selina’s side, Bloom fights against Acheron in the Legendarium World. Once there, she puts and end to the supreme sorcerer of the Legendarium by trapping him inside the infinity box; given to her by Eldora. In exchange for the creator of the Legendarium world, a satisfied Rumpelstiltskin gives Bloom the Legendarium Key. However, Bloom must face three more adversaries before leaving the mythical world.