Arc 6Conquest of Hydra City
Xiao Yu traced the Seed of Elements to the naga and led Neptulon's army through the Maelstrom to conquer Hydra City. He established The Immortals there, became a Water Elemental Lord, and prepared to pursue the Seed on Lost Island.
- Xiao Yu let Mephisto capture Deathwing in exchange for a favor and agreed to share information and cooperate with him.
- Xiao Yu found records linking a Seed of Elements to the naga and discussed possible cooperation with Qin Shiyue and her mermaid forces.
- Xiao Yu returned after maintenance, accepted Neptulon's campaign against the naga, and assembled an army of elementals and players.
- Xiao Yu's army defeated the naga forces guarding the Maelstrom, and he led his troops through it toward Hydra City.
- Xiao Yu's forces overcame Lady Xiwadelin's army and Nine-Headed Sea Serpents, while Lady Xiwadelin fled after receiving orders from a mysterious voice.
- Azathoth secured Sgelari's loyalty and freed him, then learned that the Seed of Elements lay in the naga temple on Lost Island.
- Xiao Yu occupied Hydra City, expanded The Immortals, recruited thousands of players, and rebuilt the city with elemental buildings and hydra nests.
- Xiao Yu used Neptulon's crown to become a Water Elemental Lord, claimed Hydra City as his fief, and planned to contact the Mermaid Kingdom and Song of the Ocean before attacking Lost Island.