User blog comment:FairyRaven/Fairy Tail Chapter 427: Pitched Underground Battle, Review and Commentary/@comment-26263257-20150406172525

I just read from the comments board of Real Godisme's review some wikia contributor's theories regarding why Natsu gets to one-shot everyone he faces... Well, according to him, it may be that Natsu's etherious side is beginning to manifest... and with Igneel gone, so is his dragonification.

I find it interesting.