Everyone Is Trying to Survive, They Will Definitely Fall.

Overnight, the sun was bright, harmonious and joyful, and the prosperous world turned into rivers of blood and mountains of corpses. Green-skinned, one-horned monsters suddenly descended from the sky. They sucked human flesh and blood and used the Blue Star as their food reserve... After killing the first green-skinned monster when people resisted, it was discovered that they not only had level attributes, but also some strange materials such as equipment elixirs and refining charms, and even career certificates! Since then, mankind has embarked on a powerful road to survive and change jobs! "The experience of all races in the world has officially begun. The losers of the matched parties will be enslaved, and the winner will advance to the next round!"