MTL - Book of Technology - Chapter 17 biology

“Married rich for three years with no child born. Just when she was finally cured of infertility and ready to give him a child, he brought home his pregnant mistress in high profile.

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

Su Nan accidentally came into contact with a game called “Demon World” and obtained a unique talent.

Just as he thought he would showcase his skills in the game, he discovered various signs indicating that the game he played was not simple.

Rampaging players, immortal demons, possessed monsters...

All sorts of incredible things happened one after another, and the real world gradually became bizarre.

Sensing the danger around him, Su Nan decisively chose to secretly develop himself.

When the game merged with reality, he looked back and realized that he had long become the biggest demon in the eyes of the players.

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Cao Xin, a young man on earth, died in a car accident, traveled to a troubled world where supplies were scarce, and obtained a “Bronze Immortal Gate”…

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- Description from novelbuddy