watch 02:45 The Loop (Games) Do you like this video? "Feed the Eidolon Ally, and it will be transformed." —Eris Morn― In-game description Essence of the Oversoul is a material used to upgrade Eidolon Ally to Necrochasm. It is obtained after completing the quest The Crux of Darkness. ReferencesEdit Retrieved from "https://destiny.fandom.com/wiki/Essence_of_the_Oversoul?oldid=189232" Categories: Destiny Materials Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.