User blog comment:Carebearheart/Female Dragon Slayers/@comment-7418318-20150130094527

I think there should have been one or two previously in the story, but as far along as we are I don't want yet another Dragon Slayer added. There are already seven (eight if you count Acnologia) practitioners of this "Lost Magic" making it one of the, if not THE, most commonly used kinds of magic in the manga already.