User blog comment:IamJakuhoRaikoben/Chapter 379: Tartarus Arc, Part 3: Underworld King, Review./@comment-17764746-20140404080519/@comment-36.77.77.78-20140404081115

franmalth surviving natsu's attack in chap 366 and until before he was defeated, was because of his curse: soul.. objects that have soul even the magic too ,, couldn't done damage to franmalth cause he can just absorb them n become stronger,,, thats why natsu had to defeat him without magic