User blog comment:FairyRaven/Fairy Tail Chapter 416: Tartarus Arc: Final Part, Review and Commentary/@comment-162.207.38.121-20150120001811/@comment-5840892-20150120202935

Oda is a genius as he just makes this stuff up as he goes for the most part. Then he makes it work and fit into the previous continuity.

That is indeed genius level work