Here are the power levels in the MC's current world:
Realm:
Body Nourishment Realm
Qi Gathering Realm
Foundation Establishment Realm
Golden Core Realm
Nascent Soul Realm
Established Soul Realm
Emperor Realm
Divine Realm
etc... Will add or change this in the future.
Cultivation Manual Ranks:
Each cultivation manual rank is divided into I, II, III, and IV, with IV being the best.
Bronze
Silver
Gold
Obsidian
Imperial
Heavenly
Divine
Godly