And even then, most only modify a preexisting spell. Only a few truly new spells being made every few years, most being released by the crown, some being made by Celestia herself every so often. For my own mental sake I've decided to abbreviate the matrix names to P.N.M and M.M and finally P.S.M to keep better track of them as an example my first spell would be a P.N.M as it's only numbers.