Board Thread:Advice from Ashy, the "Competent Zeref."/@comment-30807545-20161013104945/@comment-3030647-20161013115956

Seith Magic does not manipulate living souls. It manipulates souls that exist in the environment.

Fine, I'll be specific. Black Arts was "not well known" until Zeref created the very offshoots Black Arts are defined by. There would be no need to create an antipode to something that would barely exist in the eyes of the public.