Cultivation

Introduction:
One needs to absorb the heaven and earth energy through his elemental spirit seed in order to cultivate.More potential people require more resources for cultivation. Because Immortality was against the rules of Heaven and was akin to stealing vitality from the Heavens all Immortals had to cross Tribulations as they advanced a tier. Human Clans didn't participate in Immortal cultivation as per the decree of the Human Emperor. Instead they cultivated their fleshly bodies and merged with beast souls borrowing the beasts essence to live a bit longer than normal but all in all none lived longer than a few thousand years. This also stemmed from the belief that age, death and decay were a part of life and needed to be embraced.