Martial Arts Immortality: Start by Killing the Dog Demon

The monster clan is raging, and there are disputes between humans and monsters. Chen Xuan traveled through time and became a government servant in Heyun County. At the same time, the system panel is brought. After killing the dog monster, you will get the monster essence, which can be used to deduce the skills. So he killed demons along the way and became a general soldier. But at this time, the truth of the world was discovered. After that, he went all the way to defeat the sky and became an Immortal.