MTL - Invincible Exchange System - Chapter 504 Under the story

Hundreds of years ago, Human, Celestial Clan and Demon Clan lived together on the Origin Continent. However, a great war broke out between the three races. Shan He, the leader of Human, had discovered a catalogue of methods to forge Divine Weapons. With this catalogue, Shan He led Human to defeat the other two clans and expelled them from the Origin Continent.

The peace did not last long. After the passing of Shan He, the once Glory Empire collapsed. Various forces of Human fell into a long period of wild war for the Divine Weapon Catalogue, but the catalogue was lost during the war.

The Demon Clan took advantage of the internal strife of Human. Under the lead of their new lord, Fen Tian, the Demon army invaded the Origin Continent violently.

Human soon lost a large portion of their territory. At that moment, a mysterious hero suddenly appeared on the battlefield. With a legendary Divine Weapon in hand, he severely injured Fen Tian and forced him to retreat. The united Human army chased the Demon army across the strait and to the Two Realm Plain on the Tranquil Continent.

Once again, the various forces of Human started wildly searching for the Divine Weapon Catalogue…

- Description from Novelupdates

Cheng Xi, a guileless psychiatrist with a heart of gold, who would do anything for her patients. Lu Chenzhou, a frigid businessman who refuses treatment for his emotional detachment.

Facing a meteor, I wished for a stable and respectable job and money to spend, only to become the lucky one physically carried away by the meteor.After drifting through chaos, I was reborn as Nezha.The good news is all my wishes came true, the bad news is the world is not right.Nezha, carrying fragments of the Creation Jade Slip and Chaos Pearl, doesn't want to follow the old path of becoming a tool for Taiyi to avert disasters, so he apprentices under Nuwa.What do you mean I killed Ao Bing? I don't know Ao Bing, you should ask someone else.What do you mean Yin Shou is tyrannical, he is just an enthusiast of cultivation.Stone Ji is a spirit born from rocks, naturally, she matches my expertise in mending the sky, so let her be my good friend (tool).Why do you say Zhao Gongming looks simple-minded? I think he looks very much like my brother-in-law.Let’s see how Nezha securely cultivates in the prehistoric world, defying fate and ascending the Great Dao.

One of the seven strongest people on the continent, the King of Mercenaries. He started a war to avenge his fallen family and destroyed territory but failed and lost his life. However… “Wow, I’m alive?” I returned to the past, back through time. A perfect opportunity to right my regrets and reverse everything. It doesn’t matter if people around me point fingers, calling me a scoundrel, or dismiss me as tr*sh. Because… “I’ve got a plan.” “What plan?” “A plan to destroy everything.” There won’t be a second failure. This time, I’ll wipe out all my enemies. …But first, I need to rebuild this damn estate.