Invincible Powers (Gai Shi)

Novel Summary
This novel is also known as Gai Shi
The Vast World, divided into three lands.
From the disastrous Land of Extinction, the genius Sovereign of the Medicine God Sect was unable to cultivate for his whole life. Just as his natural end was about to come, he found a way to reincarnate. However, the deep oceans of life and death, the long road of rebirth, and the twists of cause and effect were never able to be predicted. The danger was yet to come.
– Description from Novelupdates