User blog comment:Omega natsu2/Chapter 373: Let Live Or Let Die, Predictions./@comment-24039250-20140221184559/@comment-7418318-20140221190332

Or a hallucination that's merely the side-effect of what's really being done to Natsu or a "remote communication" by Zeref, with him not even being there or something that Zeref planted inside Natsu on Tenroujima acting up or maybe some kind of seal from Natsu's past breaking or... nope, that's all I got for the moment, so no more 'or's ;)