When the Great Dao Dies, I Remain; When Spiritual Energy Withers, I Endure

(Longevity + no system + non-cool text + fiction + slow pace)
(The main story is about traveling and witnessing the changes after the spiritual energy is exhausted.)
You have seen the prosperous times when the spiritual energy is rich, the myriad races rise up, and the geniuses are like the stars in the sky.
But have you ever experienced the exhaustion of spiritual energy, the withering of all laws, and the death of the great way?
Have you ever seen the huge immortal dynasty gradually become mortal? Countless sects are disbanded, and the cultivators of the world are tightly guarding the spiritual energy and staying at home?
Ants dare to exchange their life with the emperor, cultivators struggle hard to seek reform, the former geniuses struggle in the mortal world, and sick cultivators cannot die.
A hundred schools of thought contend, demons, immortality, death persuasion...
For the cultivators of the world, the exhaustion of spiritual energy is a cruel era. In this era, spiritual energy is life.
In this era, some people laugh heartily, some people live in mediocrity, and some people show their true nature.
Li Changxiao's talent for cultivation is not good, but he has the Great Dream Immortal Body. Able to control dreams, plant dreams...
Just sleeping can increase lifespan.
In addition, there is a dream space with spiritual energy in the body!
He became the most special person of this era, the only one who does not have to worry about lifespan and can practice slowly.
After the spiritual energy was exhausted for three hundred years, he walked in the mortal world, settled grudges, and watched the clouds rise and fall.
He witnessed the defeat of the Endless Immortal Dynasty, the fall of the Immortal Holy Land, and the sea turned into mulberry fields and turned into the sea again.
He is a preacher, a long-lived guest, and an extremely evil...