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GA.png Non-Canon: REMINDER! This page is considered as among one of the many pure game contents found exclusive in Mass for the Dead only. It includes the new standalone characters that had a first-time appearance in the game. Meanwhile, the old characters had a different role and fate than from the main storyline in the official books. For that reason, it has no connections to the canon story materials of Overlord Light Novel series. The content that you had read here are based on the Overlord mobile game.

Tide Pool (区切られた水場) is the tentative name for a location in Mass for the Dead.


The tide pool is an area that serves as a place where the Legendary Mermaid emerges according to local legend. If the Promise Stone is dropped into its waters, the sound it emits will summon the entity from the depths.


Mass for the Dead Arc[]

Main article: Mass for the Dead Arc

The place was sought out first by Tsuibayaya who needed the scales of the Legendary Mermaid to complete his work. Later, Tsuibayaya was convinced by Blue Roses and the protagonist to allow them to take the mission on his behalf when he was injured. While Blue Roses searched fro the Promise Stone, the Pleiades secretly helped the protagonist to search for the place of "separated water" mentioned in the Legend of the Mermaid. It was CZ2128 Delta who found it as she pointed out that the nearby sea cove was now apart from the sea due to being at low tide. The protagonist then rejoined with Blue Roses, and together they used the Promise Stone to summon the legendary being who turned out to be a powerful Merman. After their business with the Legendary Mermaid was concluded, the demi-human had vanished back into its depths. Though unknown to the adventurers and entity, forces from Nazarick had placed observers all around the area.[1]

Layout & Features[]

Originally a cove located near the coast of the Re-Estize Kingdom, it is a tide pool that became like this during low tide. This only occurs so far when four specific stars shine in the sky. Unlike normal tide pools, this body of water is not shallow. Rather, it connects to an underwater network of tunnels that leads to the seabed.


  • A tide pool occurs when the tide retreats and leaves seawater trapped in indentations in the sand or rocks.



Re-Estize Kingdom
Re-Estize Ro-Lente Castle Magician's Guild Re-Blumrushur Re-Robel E-Naüru Re-Uroval E-Pespel
Baharuth Empire
Arwintar Grand Arena Imperial Castrum Ministry of Magic
Roble Holy Kingdom
Hoburns Kalinsha Loyts Prart Rimun Debone Great Wall Holy Kingdom Liberation Army Base
Sorcerer Kingdom
Great Tomb of Nazarick Log Cabin E-Rantel Katze Plains Carne Village Monument of Ruin Great Forest of Tob Abelion Hills Great Lake Underground Tomb
Elf Country
Crescent Lake Great Forest of Evasha
Dwarf Kingdom
Feo Jera Feo Berkana Feo Teiwaz Maze of Death Great Rift Feo Jera's Garrison
Other Locations
Eryuentiu Azerlisia Mountains Sea City Sasasharu Ruins Silent City Bown Swamp Rhynd Sea Sewage Treatment Plant Vadis Free City Quarry Tide Pool