The Charm of Soul Pets (WN) - Chapter 24 - Soul Technique, Chong Mei

In the tenth year after the new era, the world finally came to an end. Zhang Mu truefully waited for his death, but unexpectedly found that he had returned to ten years ago. With his memory about the future, he swore that he would change the calamitous history, saving the earth from being destroyed! Walking dead, zergs, evolvers, and various mutated animals… nothing can stop him! The first step is to retrieve his identity as an era merchant , then find all the treasures he can remember to enhance himself!

- Description from Novelupdates

After dying from betrayal, Thomas reincarnates as Jolthar Kaelzhar, the neglected son of a powerful clan, just after his brothers kill him. With Jolthar's memories and the blessing of Qalena, Thomas vows to rise from his lowly position and claim power in his new life.

In the midst of a ruined forest, due to the result of the clash between peak powerhouses, a body of a man lay. He was known as the 'Evilest Villain', the worst man ever born in humanity.His body was full of wounds with a spear piercing his heart. However, even in his final moments, he was calm and collected, with his usual cold face.

The only thing on his mind was, “Forgive me, I couldn't keep my promise to you.”

He closed his eyes, ready to begin his eternal slumber in the darkness.

Suddenly, a blue light appeared, with ancient text that read, 'Do you want to turn back time, my child?'

He laughed and said yes.

| Fate Devourer System |

[Initializing......................24%]

[Authority: Deus Time Control (Rank ?!?) used]

[The Goddess of Time wishes you the best].

Li Chengfeng, a scientific research genius of the 21st century, traveled through the Tang Dynasty and turned into Li Shimin’s six-year-old son?

  In the god-given god-level bear boy system, Li Chengfeng grabbed Li Shimin’s beard and started mad at Fang Xuanling and Du Ruhui, but there was nothing they could do about it.

  Li Chengfeng used his genius scientific knowledge to solve natural disasters by diverting water from the south to the north, and the hybrid rice developed by him can produce 2,000 catties per mu.

After destroying the Turks and subduing Goguryeo, Li Chengfeng was conferred the title of God King of the Tang Dynasty at the age of six.

It can be said that Mo Chou has no confidant in the future, who in the world does not know the king?

- Description from novelbuddy