Full mastery of Haki

Ok! So, I decided to write this because I can properly study if I don't do it

I will talk about the full mastery of the three types of Haki. I am not sure if I posted this in the right section , so guys,if you feel like this is a theory or anything , feel free to change it's place (if you can do that).

I will use canon and non-canon One Piece sources as inspiration as well as draw inspiration from other sources.I won't quote anything because I feel like it's not a necessity....

Full mastery of Haki