Power levels.

For talents (from weak to strong) :

-Ultra white

-White

-Green

-Blue

-Purple

-Gold

-Red

-Black

-Vantablack

(Note : there are also sub levels between them.)

For weapons (from weak to strong, according to system.) :

-Normal

-Rare

Super

-World

-Legendary

-Mythical

-God

-Law

-Supreme

-Rule

For skills from system :

-F

-E

-D

-C

-B

-A

-S

-SS

-SSS

-EX

-Unique

-Supreme

-Ultimate

-Origin

-(Skills below unique level are further divided into -, ,+ stages)

For skills learned in their original world :

-Ranking depends on the ranking given by world.

Ranking of systems :

-Parasite type

-Soul type

-Ruler type

-God type

-Supreme type and Supreme parasite type

-Origin type

For Stats :

- From 0.0001 to no limit (Average stat of a world depends on the type and power level or world.) 

Birth Privileges :

-Good or Bad