User blog comment:Wrath022/Chapter 516: The Truth About Enchantment, Review/@comment-26184007-20161227091437/@comment-24546844-20161227194250

Natsu isn't inside his body. He is unconscious and having a very realistic dream that, for some reason that probably won't be properly explained, know more about him than himself. The seed is, or at least is being implied to be, a physical thing so having an internal fight should in no way remove it.