User blog comment:Real Godisme/Chapter 481/@comment-25111584-20160411135846/@comment-25111584-20160411200307

Yeah, the moment Franmalth became unable to use Aries as a defense, Natsu conveniently got the idea to use a non-magical attack. Makes perfect sense. ^^

The moment somebody says that magical attacks won't work on them, obviously you'd go for non-magical ones. But Franmalth doesn't have any defense against them, so he'd use Aries. Why would he use Aries against attacks that might make him stronger? With Aries there, Natsu can at least land magical attacks, even LFDM, but he wouldn't even be able to use non-magical ones. The moment Aries disappeared, well... I realize you don't have much respect for Natsu's intelligence, but please do give him credit for his martial sense, which is extraordinary. You're being far too biased against him. :/