Monster: I Killed People from the City to the Wilderness

A hundred years ago, after a roar, mankind entered the darkest age. At that time, the demon clan was causing trouble in the world. With the mountains and rivers shattered, the alliance of all the countries wiped out the land with nuclear bombs, and Zhao Tianzong rose up powerfully, chasing the Wolf Demon King for thousands of miles, the countries and the demon clan ushered in a brief period of peace, and a new era came! However, the real catastrophe has just begun It turns out that all of this is just a speck of dust casually dropped by the Lord in the sky... The ancient saints were dead and the world was about to be destroyed. A young man drew his sword and stood in front of the world.