Blood Evolution System - Chapter 221: The Mastermind (a)

One day, Zhang Fan, a poor medical student, receives a medical system from the future. This turns him into a new shining star in the medical field. Along the way, he must face medical corruption, competition, and infighting from other doctors, and even find time for a love life as he strives for the top of the medical field!

- Description from Novelupdates

Yasuo Zoldyck, an assassin who was once a biologist seeking to extinguish the limits set upon him- To no avail.

Now, in a world where the impossible is possible, how far will his researching mind push him? Can he break those limits?

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The world where the Hero and the Demon King continue to oppose each other. The grand magic from the Hero and the Demon King cross over worlds and exploded in the classroom of a certain high school.The students who died in the explosion will be reincarnated in a different world. The protagonist, who had the lowest reputation in the class, was reincarnated into a spider. Nevertheless, she adapted quickly to the present condition with strong willpower.This is a story of she who has become a spider trying whatever she can to live.

Mo Ran felt that taking Chu Wanning as his master was a mistake.