I put this here so it’s easier for everyone to check.
Ranking system:
Demons ranks:
1: Imp.
2: Brute.
3: High.
4: Fiend.
5: Nightmare.
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Physical school (Knights, swordmen, thieves ...) ranks:
1: Apprentice.
2: Official.
3: High.
4: Elite.
5: Lord.
Spritual school (Wizards, necromancers, scroll masters ...) ranks:
1: Apprentice.
2: Novice.
3: Adept.
4: Master.
5: Arcane.
Beasts ranks:
1: Common.
2: Fierce.
3: Ferocious.
4: Elder.
5: Prime.
The higher ranks are called the same for all species and schools:
6: Grand.
7: Epic.
8: Arch.
9: Divine.
Nine Layers/Circles of the Abyss:
First Layer: Limbo (Sloth)
Second Layer: Himer (Lust)
Third Layer: Gastro (Gluttony)
Fourth Layer: Pleon (Greed)
Fifth Layer: Phthos (Envy)
Sixth Layer: Hypsos (Pride)
Seventh Layer: Thymos (Violence/Wrath)
Eighth Layer: Apat (Fraud/Deceit)
Ninth Layer: Prodo (Betrayal/Treachery)
Note: Limbo is derived from Dante’s Inferno; I made up the names of the other layers myself. Besides, I also modified the sins of some layers to match the worldbuilding better.

