I mean, it's simply shape manipulating a fire jutsu(Ama), as stated by Cee when Blaze Release: Kagutsuchi was used in it's shield version.
Most people say Advanced Natures are when someone with a KKG can mix two or more natures together to form a new one.
Yet Blaze isn't really something that fits into that catagory.
This could also mean that several Natures can simply be offshoots of certain Natures.
IE: Steel could originate from earth. Or Swift is the Body flicker technique, and maybe a nature like lightning, in an offensive form.
Either that or Kishi's contradicting himself.
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Most people say Advanced Natures are when someone with a KKG can mix two or more natures together to form a new one.
Yet Blaze isn't really something that fits into that catagory.
This could also mean that several Natures can simply be offshoots of certain Natures.
IE: Steel could originate from earth. Or Swift is the Body flicker technique, and maybe a nature like lightning, in an offensive form.
Either that or Kishi's contradicting himself.