Side Chapter: Dungeon Conquest!
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The 'Undead, Squirrels, Alligator and Spider' Team, made up of the combination of the former slaves of the Dark Moon Empire who became strong warriors and servants of the Empress, and the group made up of undead-type demi-human that became undead after evolving from alive species, reached the last level of their dungeon exploration in the coastal regions of the border continent near the vassal nation of Athetosea.
In such coastal region, small tribes of Cancer, Crab-type Arachne that lived near the coast and beaches and worshiped a Demon God that created the dungeon for them to acquire resources inhabited.
These tribes also included, though in smaller quantities, other species of aquatic-adapted demi-human, such as Scylla, Mermaid, Mermen, and so on.