The sources of magic are:
Divine
A "type" of essece, that is subdivided in 6 convocation: fire, water, earth, air, mind and nature.
No "material" can be created, but needs a focus.
To cast fireball a flame is needed.
To cast "sea of fire" you need a large surface of flamable materials (like underbrush, etc.).
Magic is very powerfull, but not omnipotent and is very exhausting.
Mages (Shek-pvar) create their personal spells. There isn't a concept as a "general" list of spells.
Every shek-pvar is a world apart, even from the some convocation.
That said, even magic items are common, but a lenghty process to do, and are not the definitive item.
Even healing is an acceleration of the process.
So IF you will heal in a week, with a divine spell you heal in a day.
If you will NOT heal, because the wounds is grievous, you will have much difficulty even with magic, and can still die.
