United Lands of the Poseidon Ocean

The connected cities.

The United Lands of the Poseidon Ocean (ポセイドン海の連合国 Poseidon-kai no Rengōkoku) was a kingdom in the Yu-Gi-Oh! ZEXAL anime containing of several islands connected via bridges. It was united by Nasch, who became the ruler of the land and was well-loved by his people.

History

The kingdom was eventually attacked by Vector, who led a large fleet of ships in an effort to destroy and loot the land, aided by a group of "Gorgonic Guardians". Nasch ordered the land's soldiers into battle equipped with mirror shields, which were able to defeat the gorgons by reflecting their own weapons back at them. In response, Vector performed a blood sacrifice to call forth the ocean god, Abyss, which turned the tide of the battle to his favor. Nasch's sister Merag rode up to where the ocean god stood and was grabbed by its gargantuan hand. Despite the intervention of Nasch's friend, a knight named Dumon, Merag did not want to be saved and instead pitched herself into the depths to call forth a goddess in order to purify Abyss.