User blog comment:B214/Chapter 510: Natsu's Heart/@comment-26184007-20161114110436/@comment-7418318-20161114202031

That Sting wasn't seen doesn't matter all that much in my opinion.

But was does is August's talk with Jellal, in which he said that only his mother could defeat Larcade. And Sting is most definitely not Larcade's mother. ^^