World-Ending Demon Emperor - Chapter 39 - 37 Zhi Ningxue!

In the endless Universe is eight primordial laws. Each of the eight laws have been fused with a supreme expert, but unbeknownst to everyone, there is a ninth law in the universe. It tears open the Primordial Chaos and is beyond reach.

Shen Zhixian transmigrated into a book as a cannon fodder master who hatefully severed his disciple’s spirit root. This disciple fell into the devil’s path and returned to make mincemeat out of him.

Shen Zhixian just happened to transmigrate into the last moment of the master’s captivity, and then he was reborn again.

After rebirth, he devoted himself to fostering and supporting his disciple, only to discover later that his disciple was also reborn.

Even worse, the disciple still retained the memory of his life before rebirth.

Shen Zhixian: …Disturbed.

Afterward, he realized one truth: Being a master is a high-risk occupation. Not trivial at all!

- Description from Novelupdates

In the mystical land of Teyvat, where elemental forces collide and secrets of ancient gods remain buried, an ordinary traveler awakens to an extraordinary destiny. Armed with unparalleled ambition and a mysterious system, they embark on a quest to become the Supreme Arbiter—the ultimate authority over all creation.The world of Teyvat is no stranger to conflict, but its hidden truths are more treacherous than any battle. Beneath the veneer of harmony lies a struggle for dominance among divine beings, and the enigmatic Heavenly Principles rule from the shadows. Yet, this traveler defies fate itself, determined to shatter the chains of divine control and reshape the world.Guided by a unique power to harness and manipulate the essence of Teyvat’s elements, the protagonist builds alliances with heroes from every nation—Mondstadt’s free-spirited knights, Liyue’s calculative sages, and Inazuma’s thunderous warriors. However, their journey is far from peaceful. Ancient enemies, forbidden truths, and the ever-present gaze of Celestia test their resolve at every turn.As they ascend in power, unraveling secrets that defy the understanding of gods and mortals alike, one question looms: What does it mean to be the ultimate authority?Will they bring salvation to Teyvat, or become its greatest threat? The skies tremble, the earth stirs, and destiny itself bows before the rise of the Supreme Arbiter.

Killed by a Sage Emperor and reborn as his 13 year old self, Nie Li was given a second chance at life. A second chance to change everything and save his loved ones and his beloved city. He shall once again battle with the Sage Emperor to avenge his death and those of his beloved . With the vast knowledge of hundred years of life he accumulated in his previous life, wielding the strongest demon spirits, he shall reach the pinnacle of Martial Arts.