(That's why I said they usually have mastery over one, they don't necessarily have to represent them all, it just helps being one of the most powerful monsters if you have mastery, I mean just look how useful the elements are for Luka when he masters them. And as for becoming one with an element i mean each one<br/>has a nature. For example, a calm and serene state of mind is useful for water and to be one with wind you must be playful with it.)