SOUL CULTIVATION is the process in which cultivators strength their soul by cultivation of Qi, the beginning of soul cultivation starts only after 'SOUL FORMATION REALM' cultivation of soul is one the major things to advance to further in cultivation because even the body is destroyed people can still love if there soul is safe.
They do thingd which are not possible with body cultivation even an LORD REALM SOUL CULTIVATOR can defeat a 'MAHAYAN REALM CULTIVATOR ' with ease if mahayan realm cultivator does not have atleast heavenly realm soul cultivation.
Just like body cultivation soul cultivation also has major realm and sub realms.
The only difference is that instead of 9 sub realms in cultivation it has just four sub realms namely Initial, intermediate, advance, and lasty Absolute.
Realms of soul cultivation are :-
SOUL FORMATION REALM
EARTH REALM
HEAVENLY REALM
LORD REALM
ANCESTRAL REALM
IMMORTAL REALM
CELESTIAL REALM
DIVINE REALM
GOD REALM
MYRAID REALM
SUPREME REALM
MYSTIC REALM
PRIMORDIAL REALM
TRANSCENDENT REALM (MC'S CURRENT REALM)
PRIMEVAL REALM
BOUNDLESS REALM
CREATION REALM
PRIMORDIAL EXISTENCE ( MC'S FORMER REALM)