Chongfei Manual - Chapter 78

The world that nurtured the civilization which reached the pinnacle of magic was on the verge of destruction.
The last survivor transmigrated to the past, when the magic civilization started growing, as countless mages were still fumbling their ways through the thorny paths of magic knowledge.
He, who came from the end of the magic era, aim to reach the pinnacle of magic.

- Description from Novelupdates

The world had changed when the System arrived, alongside the Cataclysm that filled the world with monsters. The technology was gone, replaced by classes and skills that allowed the people to fight back. When Devon ended up as a Blacksmith, a class that didn’t grant Intelligence, he had to face the reality, that his old career that he loved - mathematical sociologist - was over. Instead, he had ended up as yet another discarded member of the production class, overshadowed by the existence of the System Shops to the point of total marginalization. But, what if all he needed was to reapply his scientific thinking to the System...

This is a world where strength is considered supreme.The story follows Wang Li, who was once a comrade of the Protagonist Ye Fan.However, there comes a time when Wang Li and his family falls for the schemes of Ye Fan and loses all their prestige and power.Wang Li recieves a blessing from his ancestor and uses this blessing to change his fate and step on Ye Fan and countless other protagonists.And as he steps on more protagonists, Wang Li becomes more villanious day by day.

Jun Xiaoyao was transported to a mystical world and became the divine child of a Clan of the Ancients. He came to possess an invincible background, unparalleled talents and even a check-in system, enabling him to acquire an Accomplished Sacred Body of the Ancients at the very beginning of his new life.“Haha, this is my grandson, my grandson has the bearing of an emperor!”“With this child, my Jun Family can compete for an empire this era!”