Reborn in Three Lifetimes, I Finally Reach the Top

(No system + no AI + no heroine + decisive killing + IQ online is not a virgin) He is considered by others to be the number one genius of the Ren family, and he is also a bloody massacre that makes people laugh at him. When the human race is in trouble, he does his best to help, and he never hesitates when the road is rough. It's just that he killed more creatures when he was helping. Why are you so scared when you see me? What does it mean to prove the truth through killing, and what does it mean to be an alien nemesis? I'm just a cultivator who does my duty. That's right, a cultivator who loves peace and his duty. The introduction is weak, please move to the main text to read. (The author is determined to show readers a vast world of cultivating immortals, in which some of the author's personal imagination is mixed. I hope you will like it)