From BRWiki
Greater (true) arcane magic is the magic wielded by Cerilia’s sorcerers and wizards. The casting of true magic in Cerilia requires the harnessing, mastering, and channeling of mebhaighl. The ability to harness and shape this immense magical essence is a matter of heredity - true mages must be born with the stuff of magic in their veins. This ability is exceedingly rare; only those of elven descent or blooded scions (whose ancestors were touched by the gods) have any hope of mastering the forces of greater magic. True mages are uncommon and many are figures of mystery and destiny.
Other forms of magic are:
