User blog comment:Imouto-tan/Destiny Military Academy/@comment-4867780-20151228113143/@comment-26362471-20151229133253

Spell Artes and Ars in general can look like and be almost anything and grimoires are needed to use Spell Artes and Ars. There are special weapons that run on Mythral and use grimoires as catalysts to use Ars or Spell Artes.

Yes, in a sense you could call them the magical equivalent to Espers in To Aru.

Hmmm...that sounds like a good idea