Grades

Grades, also called tiers, rank beings in the System from F to S, and each grade is split into early, mid, late and peak stages. The gap between grades is far larger than the level difference suggests: killing a being one grade higher usually takes a large group, and doing it alone is reserved for true geniuses. At the peak of a grade, a being must complete an advancement quest to move up. A special G-grade is given only to beings who had never been exposed to mana before gaining the System.