User blog comment:Wrath022/Chapter 516: The Truth About Enchantment, Review/@comment-26184007-20161227091437/@comment-24546844-20161228192130

Zeref and each of the Dragonslayers were there too and that meant nothing. It wassaid in panel that Natsu's mind is just making them appear for him to understand the explanation easily. There should be not manifestation of demon powers simply because there's no need for it as everything has already been explained. Unless Hiro goes the Naruto's waterfall trainig and Natsu has to fight himself and frankly that would be bad.