Tier Magic

Tier Magic is the system of spellcasting used by the players of YGGDRASIL in Overlord, and the dominant form of magic in the New World as well. It appeared there some five to six hundred years ago, when the Six Great Gods used it to defend humanity against monstrous races, and it spread until it was written into the world's understanding of magic itself. Unlike Wild Magic and Runecraft, which are tied to particular races, Tier Magic can be practiced by almost anyone, and its spread has pushed those older traditions into decline; even dragons and dwarves favor it over their ancestral arts. Spells are graded by tier, and among humans anything above the seventh is a matter of rumor rather than record. The inhabitants of the New World are nowhere near the limits of the system, and they have gone on inventing spells of their own inside it.