Bone Magic:
Created by GowlerDefault Schools
Universal: This is hard to master (less focused) but can potentially replicate any other class of magic
Divine: The working of miracles from the gods. Belief is necessary for decent results and typically supplies the Essence for the action.
Celestial: This covers using the Constellations and moons and other stars to exploit them, whether to help or hurt.
Musical: This covers not only music but also poetry. It probably extends to inspirational speeches, morale-depleting speeches, powered-up one-liners, and stuff like that. So it's music but mostly not music.
Psymental: This is typical psionics business, including telekinesis, reading minds, manipulating minds, and stuff like that.
Ritual: This covers consuming/using multiple people (with varying degrees of literality) to boost actions.
Necromancy: This covers manipulations performed on souls. In many civilizations, use of necromancy is probably a taboo.
Elemental: Mostly just playing with classical elements
Dimensional: Creating/destroying/modifying portals and pocket dimensions, transporting stuff, traveling through space, traveling through time (if justified. PM first.). Probably difficult because of its power level.
Cosmic: Doing things you do as gods on a small scale. Mortal souls are not equipped to handle the energy requirements and may end up getting permanently destroyed when they try to do too much.
Enchantment: Infusing items with magic for various effects
Lawmancy: An evil art practiced only by the most twisted of mages
Eldritch: Void stuff?
Illusion: Deception, fooling the senses, invisibility, and more