User blog comment:IamJakuhoRaikoben/Chapter 503: The Last Sight Seen, Review./@comment-84.197.239.101-20160926192137/@comment-7418318-20160928145727

I'm just going to ignore the whole Bloodman and curse/magic debates and get back to the actual topic of the thread.

First of all we don't know if Natsu really has magic immunity now, but even if he has, it means little. Hiro will find some way to make it work, whether it makes sense or not. :P

ISDM was tailor made to defeat Demons/Devils, so it being able to cut through an otherwise inpenetrable immunity would be right up that alley. Just like Dragons are immune to any and all forms of magic, except their own and that of Dragon Slayers.

It could well be that this immunity/resistence is something that Zeref based off of how Dragon immunity works, but he only developed that right before creating E.N.D. Later someone else (or maybe even Zeref himself) somehow managed to take the lesseons from Dragon Slaying Magic and apply it to that new Demonic immunity, thus creating Devil Slaying Magic. Of course it would mean that if anyone other than Zeref came up with it, Zeref must have created some other being with such an immunity after reviving Natsu, since if Natsu always was the sole posessor of this immunity, nobody would have ever learned of it, nor seen a need to counter it.

And even if neither of those is the case, this would hardly be the first time magic works on something that should be immune to it. Just remember the whole Magic Barrier Particles debacle...

As much as it would suck, there is of course also the possibility that Dimaria's guess is correct and that Natsu has become too powerful to be affected by her power.

In theory it's also possible that Ultear once again intervened and shielded Natsu and Dimaria just didn't notice because she was too cowed by Natsu's sudden revival and power-up.

Another possibility is that Natsu's new powers are linked to Ankhseram and that one god's abilities counter another god's abilities.

Or Natsu was tailor made to resist God-powers so that he could counter Ankhseram's curse, which would mean he'd be fully susceptible to any kind of magic or curse (save for flame obviously), unless it's used by a God or someone linked to a God. Dimaria's time-stop powers come from her connection with Chronos after all, so they'd fall under that category.