Note that each big realm have 10 level in it, from I - X

Mortal cultivation level:

Qi Refining

Foundation Building 

Soul strengthening 

Core Formation 

Nascent Soul

Nihility

Saint 

Mortal Monarch

Ascension 

.

Immortal cultivation levels:

Half Immortal 

Profound Immortal 

Golden Immortal 

Venerable Immortal 

Immortal Saint 

Immortal King

Immortal Emperor 

Quasi Celestial Immortal 

.

Celestial cultivation level:

Celestial Immortal 

Profound Celestial Immortal 

Venerable Celestial Immortal 

Celestial Immortal King

Celestial Immortal Emperor