Sain World, Mermaid Sanctuary, where ninety-nine percent of the territory is covered by endless ocean, with only scattered islands dotting within.
Since antiquity, the merfolk clan has thrived here, reaching the peak of civilization three hundred years ago... Whale Emperor Sain was born.
Since then, the merfolk clan had their own Level 10 Strongman.
But at the same time, the merfolk clan welcomed the worst era.
Abyssal invasion, blood battle began, lives devastated.
The lord of the 186th layer of the Abyss, [Old Sea Dominator·Rul] is the commander-in-chief of this battlefield, whose true form is a Fish Demon, with a legion of Level 9 Generals under its command.
Initially, the Abyss thought that a newly emerging level-10 civilization could be swiftly annihilated, but unexpectedly, under the command of the Whale Emperor, the merfolk clan resisted until now!
On this day.
Whale Emperor's Palace.
A vast and towering figure of ten thousand feet sits there precisely Sain.
