In the Changing World, I Have a Super Evil-Killing Upgrade System

[System + Weird Recovery + Cool Writing + High Martial Arts] The world is in treacherous changes, strange things are rampant, causing chaos in the world, people are in ruins, and the world is on the verge of collapse. More than sixty years ago, a strong human race was born, defeated the monsters, and established the rules for humans and monsters to coexist in the world. However, more than sixty years have passed, and conflicts within the human race have occurred frequently, waves have surged, and strange things have returned, causing chaos and chaos again. The world has reached the edge of a cliff. Also in this year, Henry Zhang came out with the 'Super Killer Upgrade System'.