I Slaughtered All the Demons from the Start; I am the Source of Evil from Another World

(The protagonist is not human, there is no female lead, and technology is humanity's most powerful weapon! In any era, the protagonist is at the pinnacle of existence and doesn't play the fool!)

A bizarre invasion plunges human civilization into turmoil. As demons and monsters clash with technological might, an ancient evil, the Corrupted Tree, reborn in the endless void, returns to the world in the body of a mortal.

A torrential downpour stirred up the dark clouds, and the crowd knelt respectfully on the ground. Accompanied by the eerie wails of remnant souls, an unparalleled evil force tore through the sky. In the endless void, a pale, vertically-eyed phantom gazed down upon the mortal world!

"Heavenly calamity, divided into three, leads to death and ruin!"

A storm raged, and Xia Yuxuan was surrounded by a suit of skeletal armor. His pale robes fluttered in the wind, and eroded branches extended from his back, emanating a terrifying evil aura!

A calamity shrouds the sky, and an evil god wreaks havoc on the world!