Ars

Ars (, Arusu; lit. "Demon Art") is a term referring to seven Ancient Spell Caster Magics, typically associated with Demons, but also with Angels and divinity. Each Magic is referred to as a "Grimoire" (グリモワール, Gurimowaaru lit. Manual of Black Magic), despite not the magic being caster and not taking any form akin to a book.

Trivia

 * Ars is inspired and based off the Lesser Key of Solomon, and all seven (technically six) books.
 * Ars has no relation with the canon magic, Ars Magia.
 * In reality, Ars is a magic all about asses and rear ends.