Not much is known about this form of Magic except that it allows its users to use a specific element to slay Demons. It also lets the user eat their respective element to replenish strength and become immune to its effects like other types of Slayers. It has also been suggested that Devil Slayer Magic is a very fickle Magic, and that learning it too quickly and making use of its properties in rapid succession have adverse effects on the user, causing them to become afflicted with black markings that spread across their entire body. The users who master this Magic are able to summon these markings at will, allowing them to become immune (to a limited degree) to the effects of Curses, including the "Ultimate Curse" Memento Mori, which is supposed to completely annihilate whatever it touches. This Magic also allows its users to obtain information about a Demon by just observing it for a second.