"Why are you still in a daze? Run!" Someone pulled the boy, and the boy came to his senses and ran into the office building.

As soon as they ran into the office building, a flash of lightning flashed across the sky, and then it started to rain heavily.

The zombies that were originally chasing people stopped, stood where they were, and raised their heads, as if they were receiving a sacred baptism.

Qi Jinnuo was standing in the corridor on the second floor. When he saw this scene, he suddenly remembered that the zombies were about to evolve!

In the original text, it was because of a sudden black rain that water resources were polluted, animals and plants began to mutate, and zombies evolved.

It is also because of this black rain that a lot of impurities appear on the earth.

The black rain fell into the rivers, polluting the water sources. The water dissolved into the soil and irrigated the plants, causing the plants to also have impurities. The flowers that bloomed and the fruits that were produced all had impurities.

These are eaten by humans, causing impurities in the human body.

Impurities will slowly accumulate in the body, and when they reach a certain level, black rain disease will occur.

In the early stages of black rain disease, people will be very irritable and easily lose their rationality. As more and more impurities appear in the body, the skin begins to ulcerate and stink to varying degrees.

And the more impurities there are in the body, the grayer the skin will be.

After evolution, crystals called sun crystals and moon crystals will form in the brains of zombies.

Sun Crystal is golden in color and is used for the evolution of abilities. The higher the energy of the crystal, the more golden its color.

Moon crystal is used to purify impurities in the body. The closer the color is to transparent, the better the purification effect.

This black rain marks the beginning of the end of the world for mankind.