Global Corruption: Necromancer! From the Start, I Dig Up My Ancestors' Graves

[Decisive and Ruthless] [Dark] [No Goody-Two-Shoes] [Devouring Evolution] When black pillars descended from the sky, strange mutations erupted across the globe. Monsters, zombies, ferocious beasts, undead, and dark creatures of every kind turned Blue Star into a living hell. By chance, Xiao Chen was reborn to the time before the black pillars arrived. Familiar with the rules of this dark transformation, he caught cheating couples in the act, dug up the graves of unfaithful men, raised funds, stockpiled supplies, built a shelter, and spent a fortune to buy a bamboo pit viper. In the final seconds before the black pillars descended, Xiao Chen was inside a Five Elements Array, lying atop a pile of bones. He held a bamboo pit viper in his left hand and a live wire connected to the power grid in his right, with a black cloth over his head and his whole body beneath a bathroom heat lamp. When the black pillars arrived and the global transformation began, Xiao Chen fused with the bamboo pit viper and evolved into a Azure Dragon. He awakened Chaos-type powers, mastered the laws of heaven and earth, and became the most powerful necromancer among the hidden classes, commanding billions of undead. In the apocalypse, only the insane, the ruthless, and the heartless can survive. Do you believe in the light? I am both the calamity and the world's one true ruler. In the apocalypse, those who follow me prosper, and those who oppose me perish. The synopsis doesn't do it justice. Please read the story.