User blog comment:Uraharattack/King and his Haki/@comment-7614831-20190123193720

This is a very compelling theory, with plenty of in-manga/anime examples to back it up. The only thing that worries me about introducing elemental haki as a further mechanic to the one piece world is how much it would potentially deteriorate, to the point of redunduncy, those devil fruits of the same elemental type.