As I understand it, most or all of philosophy can be put into the three main branches of philosophy: Epistemology, Metaphysics, and Axiology.
A devotee of reason, I have great affinity for, and believe that I get the core nature of, Epistemlogy: the study of how claims of knowledge are justified, or of how we know things.
I also think I get the basic idea of Axiology: the study of values, from ethics/morals to art and beyond.
After looking up (or asking people) what the core of the study of Metaphysics is, and while the words I read or hear have meaning, some kind of "blind spot" has heretofore obstructed me from understanding basically Metaphysics's purpose. In black and white, pragmatic, and discrete terms: of what is Metaphysics the study?
I appreciate answers not to add another layer of vague and undefined confusion on top; for every explanation to this question simply makes me ask what the explanation even means! (Metaphysics asks "what is the nature of reality?", but the question makes absolutely no sense to me! I do not understand the meaning of: "The nature of reality is what it is." So what else can you say without mystifying?)
Can anyone explain the purpose of the study of Metaphysics to someone like me with a pragmatic, rational personality and approach? Every time I think I have found an answer, it turns out to be more Epistemology, to the point that I am starting to wonder if fully embracing reason results in the elimination of Metaphysics! Thanks.