S4·E26 Ice and Fire

The Wizards of the Black Circle flee as Layla and Nebula chase them toward a dead end. Determined to avenge Nabu, Layla teams up with Nebula to destroy the Fairy Hunters, but both are easily overpowered. The Winx catch up with Layla and Nebula and all eight fairies use convergence to freeze the evil wizards solid. Afterwards, Layla uses the remnants of Nabu's spirit, combined with the powers of the Fairies of Tir Nan Og, to restore the kingdom. Morgana proclaims Nebula the new Queen of Tir Nan Og, and then returns to Earth, where she is reunited with her husband, Klaus, and her daughter Roxy, while Layla returns to the Winx. With Roxy making the decision to study in Alfea and Earth's belief in magic.