Power level ranks:
F-rank: Regular human level ~90 years of lifespan
E-rank: Peak human level ~110 years of lifespan
D-rank: Inhuman level ~150 years of lifespan
C-rank: Building level destroyer ~200 years of lifespan
B-rank: Neighborhood level destroyer ~500 years of lifespan
A-rank: City level destroyer ~1000 years of lifespan
S-rank: Country level destroyer ~5000 years of lifespan
SS-rank: Continental level destroyer ~10000 years of lifespan
SSS-rank: Planetary level destroyer ~Immortal (Can still get killed by others)
???(Cosmic)-rank: Interstellar level destroyer ~Immortal (Can still get killed by others)
??????(Primordial)-rank: Reality level destroyer ~True Immortality (cannot die from age or anything else)
Skill ranks:
Early:
Intermediate:
Advanced:
Peak:
Perfection:
Artifact and Beast ranks:
F-SSS