Body Refinement Realm (1-100 power level) (H Rank)
Qi Condensation Realm (101-1000) (G Rank)
Foundation Establishment Realm (1001-10,000) (F Rank)
Core Formation Realm (10,001-100,000) (E Rank)
Golden Core Formation Realm (100,001-1,000,000) (D Rank)
Nascent Soul Realm (1,000,001-10,000,000) (C Rank)
Soul Transformation Realm (10,000,001-100,000,000) (B Rank)
Void Refining Realm (100,000,001-1,000,000,000) (A Rank)
Unity Form Synthesis Realm (1,000,000,001-10,000,000,000) (S Rank)
Tribulation Transcendence Realm (10,000,000,001-100,000,000,000) (SS Rank)
Mahayana Realm (100,000,000,001-1,000,000,000,000) (SSS Rank)
All The 'Power Level' specs correlate with the stat specs as well, i.e, (1-100 power level organism) --> (will have stats within 1-100)