Spoiler Alert: WARNING! This page happens to contain a lot of heavy spoilers that are all originated from the Overlord author, Kugane Maruyama and his collection of written works. Anime-only watchers and Manga-only readers, please take some time off to reflect it over for a bit before choosing to expose yourself on reading the information below recklessly.
Orb of Magical Boost is a magical item that originally belonged to Davernoch of Six Arms.
One of Davernoch's three magic items that he used as part of Eight Fingers' security force.
In the anime, it is depicted as an amethyst orb with a purplish glow when it is activated.
The orb responds to the owner's emotions and excludes a strange aura. According to So-bin's artwork of Six Arms, it strengthens attacks associated with [Lightning] and [Fireball].