User blog comment:Miskos3/Fairy Tail Chapter 391: Gray vs. Silver, Review/@comment-7418318-20140704072547/@comment-25111584-20140704082114

Completely agree with Poskitt99. Dragons seem to inherently know Dragon Slaying Magic (though of their own element), so why not Demons? Maybe Deliora just had to work on the Ice part of the Devil Slaying Magic (as Demons don't really seem to have specific elements), and he has a good reason to do so. Now Iced Shell mp cannot affect him.

And I don't think even Lyon and Gray together can defeat Deliora. Their magic isn't suited for it, notwithstanding the Natsu vs Zancrow battle (one of my less liked battles in FT). Need somebody else to save them... OC anybody? Maybe Meredy finally can get to shine, with Jellal going after Mard. :D