Grade

Beings in the System are ranked using grades, also known as tiers. They range from F to S and each tier is further broken down into 4 stages: early, mid, late, and peak. The difference between tiers is much greater than the difference in levels would suggest. To slay a being a grade above yourself is a difficult feat, often requiring large groups. Slaying one in single combat is even harder, an act reserved for true geniuses. Even then going above your grade is usually only possible if your opponent is in the lower stage of their grade.

G grade
Levels range: 0-10. This tier is special because it only applies to beings that haven't been exposed to mana before being introduced into the System. All other beings are born with F rank.

F grade
Levels range: 0-24.

E grade
Levels range: 25-99, where 25-50 is early stage, 50-75 is mid, 75-95 is late, and 95-99 is peak.

D grade
Levels range: 100-199, where 100-130 is early stage, 130-160 is mid, 160-190 is late, and 190-199 is peak.

C grade
Levels range: 200-349.

B grade
Levels range: 350-499.

A grade
Levels range: 500-749.

S grade
Levels range: 750-999. Peak S tiers are also known as demigods, as they are nearing godhood.