So, you want to make a spell. You have two options.
One, in the nearest Magical Library you have access to, you study all the great works you can comprehend, and slowly expand your ability to sense the energy inherent in all things, then develop a new way to manipulate said energy, via the methodology explained in great detail in previously mentioned texts.
Two, you tell the Goddesses where to go and wing it.
As someone who spends their life researching magic, you might assume I advise option one. Nope.
I get so much good information when mavericks die interestingly…