Magic Eater

Magic Eater (魔法空の魔界 (マジック・イーター), Majikku Ītā lit. Magical Vacuum of the Demon World): Magic Eater is an extremely powerful type of Black Arts which was created in the Age of Demons over a million years ago, and then subsequently lost to the void of time. It is a Lost Magic which is considered truly "lost"; and only one person has been shown to possess it. Magic Eater is only equaled to its sister magic, Graviton, as both Black Arts are said to be able to change the world if brought together.

Description
The basis for Magic Eater is that of something akin to the devouring opposing magic function of Slayer Magic; however, it focuses on the consuming process and maximizes it's potential. When utilizing Magic Eater, the user is capable of consuming anything; especially opposing magic; rendering any ability to manipulate eternano or even air useless—as the user can spread the effect outwards in order to surround them in a fifty meter wide sphere. It leaves a vacuum in it's wake; essentially, if the eternano has been chewed upon, it will affect the rest of the eternano in the area, acting as a snare trap to any eternano particles that it touches, however, the only time one will know if this attack has struck is when the ability makes direct contact to its victim, to which by then, enormous chomping wounds will have formed around the area which the ability has touched, ultimately consuming every single eternano particle around the area it has touched. If one attempts to directly attack the user when they are using Magic Eater, they will quite possibly be consumed by the user; as they've already taken a bite of the eternano in the atmosphere, thus working very similarly to a barrier which devours everything while surrounding the user. Finally, the user is capable to bite whatever they touch thanks to the barrier, regardless if their mouth has touched them or not, meaning that they can gnaw on the opponent numerous times in a row, until they are unable to keep up with the biting wounds. However, Magic Eater possesses numerous weaknesses—one is that the foe can attack the user in the process of using it with their bare hands or with a non-magical weapon, and it can only be utilized for two minutes straight before the user tires out.