First you reach a state of being that is most fit to be the master of an eliment, concept, or several said things.

Next one must be reckognized by at least three major masters, as having the potential.

The masters that vouched for you then perform the rite.

In my case, I did not even know that I was on my way to becoming a master.

I was selected and trained, by Twilight and Abyss, to become a master based on potential they and a few others saw in me.

No one knew what I would be the master of when the rite was performed.