It is a form of Ancient Spell in which the caster is able to attain the abilities of a "God", using a specific element as their type. The certain elemental type of God Slayer Magic can be conjured from the caster's body and be used for various purposes, mainly in combat. It is said that the original usage of this Magic was to slay "Gods". In addition, the color of each God Slayer's element has a black tint, regardless of what it may be. Although it is unknown how one actually learns God Slayer Magic, one such occasion allowed Sherria Blendy to learn it from a book.
Similar to Dragon Slayer Magic and Devil Slayer Magic, the caster is able to eat their own element and also use it for combative purposes. It appears that they cannot eat their own "God-like" element directly, but can eat Dragon Slayer magic of that element. The reverse does not hold true of Dragon Slayers, who cannot eat God Slayer Magic unless the Dragon Slayer has emptied out their own Magic Power to create a vessel for the respective element.
- Some God Slayer spells are named after Gods from different mythologies, with each name being relative to their element: