User blog comment:IamJakuhoRaikoben/Chapter 438: The Seventh Guild Master, Review./@comment-24039234-20150601171314/@comment-4829046-20150604082110

My apologies, I should have worded it more articulately. The lay term for that concept is also 'turning evil' so I just used that but since 'evil' doesn't actually exist on logical grounds, meh.

I think you've already answered my concerns. That would make it a repeated device and you know how I despise repetition...or wait, *to self* do you? I don't think I've made a 'lame rant' on hating repetition before :/ Granted, I do like repetition if it is awesomesauce and having something similar to RAVE, while repetitive, is awesome.

I personally see it in the manner that 'if' Natsu's demon powers manifest negatively, (which I kinda doubt since previous etherious demons were just deluded and not 'embodiments of evil' since Zeref only gave them those deadly abilities so that they could use them on him) then Natsu could just have to fight it, much like Zeref does with his curse and Mira could factor in as a support to facilitate this and we can still have the device of physically weakening through attacks in order to exorcise. And if the Gods enter to this, then we can have a more interesting turn of events since I'm sure Gods beside the recent one can use more than just physical sword swings.