I Am a Parasite, and You Want Me to Be Your Savior?

[Apocalypse + Decisive Killing + Not the Holy Mother + Villain + IQ Online] At first, no one paid attention to this disaster. It was just the simplest murder case, the most ordinary car accident, and the annihilation of a... Village. Overnight, the world completely changed, and everyone gradually realized that this disaster was closely related to each of them! An unnamed virus that appeared out of nowhere has swept the world. The virus has no pattern and no source. People infected with the virus will become irrational and crazy. And some, with randomly mutated body parts, will become monsters that can withstand thousands of armies! Such people are called parasites. Parasite: Strength and speed are increased, and recovery ability is greatly improved. Parasite is also divided into three levels. S-class ordinary parasite: has no sense, only knows how to kill. SS-level parasite: Obtaining a parasite or mutating a certain part of the body, unable to control when it will turn into a monster, sometimes awake, sometimes confused. SSS-level parasite: Integrate with the virus and can freely switch between human and parasite forms. Bai Qi, a name with the same name as the God of Killing. Before the end of the world, he was a killer. It might be a favor or a punishment. He was chosen as a parasite. The end of the world has begun. Between humans and parasites, who can become the king of the new world?