Dawn Of Legend:Rise Of An Extra - Chapter 5 :Era Of Calamity

Mu Zhiyan, after being transmigrated a millennium (1000 yrs) into the future, discovered that he was raised by his adoptive parents as a tool for them to access the heritage his (dead) biological parents left behind. When he was at a loss for what to do next, he discovered that his body hosted an additional
pharmaceutical system.

For a chance to return to his era of Earth, Mu Zhiyan decided to practice and practice; he must train the system to full level as soon as possible.

However, reality gave him a slap in the face. The world is dangerous and dreadful, making Mu Zhiyan recall his mother’s words of holding a thick thigh, resulting in him locking his eyes on a cool general…

So the rumored mysterious Mu Master faced General Han with a serious face: “I allow you to follow me, General Han.”

General Han: “…”

- Description from Novelupdates

In the Great Chu Kingdom, evil spirits are everywhere.

In this world, there are warriors, Taoists and Buddhas, monsters, and weirdness.

Xu Bai came across time, the hell started, and he was in the cell of a bandit village.

When the danger came, he found that his understanding was not quite right.

[Observe the nameless knife marks on the wall, and comprehend the bone-breaking knife technique. 】

【Observe the forging book, comprehend the forging method】

[Observe the hexagram scriptures and comprehend fortune-telling. 】

When entering the bandit village, Xu Bai tied the chain with his hands, and when leaving the bandit village, Xu Bai carried the ghost knife.

“In this world, there are many things that can be seen. I just know how to observe better than you.” Xu Bai laughed.

- Description from novelbuddy

The whole world mutated. Mysterious resurrections happened in real life. The Tribulation descended.