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Spoiler Alert.PNG Spoiler Alert: WARNING! This page happens to contain a lot of heavy spoilers that are all originated from the Overlord Light Novel series written by the author Kugane Maruyama. To every Anime-only watchers and Manga-only reader out there viewing this warning, please mindfully consider your decision first before choosing to expose yourself on reading the information below. If you're not currently up-to-date with the main source material in the official books, do consider staying away from the page for non-spoiler sake until you actually read it first ahead of time.

Demon Seal Jar (悪霊封印した壷) is an item from in the Ninja Mansion of the Great Tomb of Nazarick.


The jar was found by Nishikienrai in a closet of the Ninja Mansion when he searched for place to hide from Luci★Fer. Tabula Smaragdina explained what it was, a vessel containing an evil spirit, which made the ninja all more careful not to knock it over by accident.[1]


A large jar with multiple ofudas.


No abilities have been clearly stated on what the jar can actually do.


  • It is unclear whether the item was a decoration or an actual item. But given its appearance in the Ninja Mansion, the Demon Seal Jar is most likely part of a gimmick or trap created by Garnet.