S5·E25 Battle for the Infinite Ocean

Helia and Flora are still on the rocks, with Flora mad at him for his actions. After a ballet they make up. A call from Aisha's cousins leads to a battle between Bloom and Tritannus, and Selkies versus mutants at the Pillar of Light with Aisha caught in the crossfire: the Fairy of Waves loses her Sirenix energy to Tritannus, who intends to use them to fully activate the Emperor's Throne.