User blog comment:IamJakuhoRaikoben/Chapter 479: Who you should show the greatest respect to is, review./@comment-5.139.120.11-20160328203141

Power of Igneel was that power with circle of flame and not FDKM itself.

Theories: 1. Flame dragon king mode is like white/shadow drive. 2. So called FDKM is state of Narsu who is not holding back. 3. After Igneel's power fade Natsu started to use etherious power and he just did not notice it calling it FDKM.

Anyway I like that FDKM returned because Natsu is more like Gildarts with it. Bad thing I do not see use of lightning flame dual mode now. As it looks now LDF < FDKM =><? DF