Three Kingdoms: I Cultivate Immortality by Killing

Opening his eyes, he transmigrates into a poor boy at the end of the Eastern Han Dynasty. His home is bare, and bandits are about to strip him. Worse, this world has cultivators—and the spiritual energy of heaven and earth is drying up, the age of declining Dharma approaching. Fortunately, a golden finger arrives: a "Calamity Fortune Diagram" that can absorb "calamity aura." War generates calamity aura, which makes him stronger. Others cultivate by absorbing spiritual energy; he cultivates by killing in war. Lü Bu is a demon god, Zhuge Liang is an array immortal, and Cao Cao has a dragon-swallowing body. The Three Kingdoms is still the same, but everyone is off. This book is called "Three Kingdoms: I Cultivate Immortality by Killing." I read the first three chapters and am already hooked.