Living Magic (生命魔法 Seikatsu Mahō) is a form of Black Arts utilized by Zeref and Hades.
Description
Apparently a very ancient, long-forgotten form of Magic that brings things to life under the caster's control. Some creations of Zeref, mostly gigantic and powerful demons, have minds of their own, and continue his unknown evil quest. In "The Book of Zeref" it's written how to obtain and use this Magic.