Sea King Arthur originated from a medium world, where he was the ruler of the sea area of that world. Otherwise, he wouldn't be called the Sea King!
After all, his strength as a late stage Upper Divine Spirit could only enable him to dominate in medium or small worlds; if he were in a high rank world, it wouldn't be his turn as an Upper Divine Spirit to claim kingship!
Precisely because he'd once been the sovereign of a sea area, after wandering into this gathering place in the Abandoned Land, he did not accept the invitations of other strong beings and chose not to join under their banners.
The former sea ruler harbors intense pride, unwilling to play second fiddle to anyone.
So Arthur wielded his title of Sea King, subduing half of the sea creatures in the gathering place to serve him!
Although the lack of a sea here makes it difficult for him and his sea clan to fully utilize their war capabilities, rendering their strongest ability, Water Manipulation, almost useless!
