Sole Cloud Flying Cave

Cui Heng was transmigrated to another world and the system told him that the new world he was in was a high-grade Xianxia world.
It was a world where Celestial Kings soared the sky and terrifying monsters ruled the lands. The strong would destroy a planet if their mood was bad and Cui Heng trembled in fear when he learned of how scary the new world was.
Thankfully, the system had granted him the protection that last for 300 years. As long as he remained in the safety zone, he would not receive any damage.
With his safety secured, he began his cultivation training for the next 300 years.
Throughout the years as he trained, some people entered his safety zone by mistake.
There was a peasant who was once a monk and a beggar. Despite that, he still had the dream of bringing peace to the land and saving the lives of millions.
There was a noble who was once called the once-in-a-million-year genius. Yet, luck wasn't at his side and his talent fell and was laughed at by others for years.
There was a princess whose only wish was to find her older brother. She could've become a celestial but decided to remain in the human realm to wait for her brother's return.
There was a weak lady who was plagued with illness from birth but had the goal of adventuring and helping the poor and weak.
...
Cui Heng befriended these people and even gave them a few pointers before they left.
300 years later, when the protection period had ended, he had finally mastered the Golden Core. Even then, he was still reluctant to go to the outside world.
But when he did, he realized that the world was merely a world of Wuxia.

Realizing This Is A Wuxia World After Cultivating For 300 Years

"Die!" Immortal Ancestor Xu Cheng roared angrily, "No matter how powerful your abilities are, can you resist the power of the Primordial World gathered from endless space and time?!" "You're the only one who can make us form such an attack with the Sage Battle Halberds." Immortal Ancestor Huang Yun appeared high and mighty as he looked down at Cui Heng. "You should feel honored."

Immortal Ancestor Zongmu who was supposed to be dead in the future was still alive at this time point. He already knew about his future death and was filled with killing intent towards Cui Heng.

"Outer Dao cultivator of unknown origin, you will definitely die today!" Immortal Ancestor Zongmu said in a low voice. He was most concerned about Cui Heng's power characteristics.

This power that was completely not suppressed by the Sage Battle Halberds was filled with too many variables, making it difficult to figure out. He had to kill this person as soon as possible.

Catching Immortal Ancestors Like Catching Fish (2)