What's Wrong with Me, a Taoist Priest, Who Can Transform into a Demon?

Use your sword to angrily kill thousands of demons and protect the common people forever. "Chen Zhongchu, a poor Taoist, those who know me affectionately call me - Taoist Master Zhongchu." ... The spiritual energy is thin, there are no immortals or Buddhas, and everyone is pursuing the land immortal who is the pinnacle of martial arts. Evil spirits abound, and demons dance wildly. However, in an unknown Taoist temple in a small town, there was a young Taoist priest who transformed into a demon, swallowed monsters and melted their flesh and blood, increasing his cultivation of immortality and demonism, in order to become a true immortal. The foundation of heaven? A golden elixir the size of the sun? In this troubled world where demons are causing trouble, wherever they go, the demons and monsters will be very angry! When Chen Zhongchu had slaughtered all the great demons in the world, he sheathed his sword and suddenly looked back: Doesn't it seem that the blood energy of the ten-thousand-year-old demon has done little to increase his cultivation? When I am melancholy. Gods and Buddhas in heaven who cannot tolerate such existences in the lower world come to the mortal world. He raised his eyes to the sky and stepped up into the sky; looking at the shadows of gods and Buddhas all over the sky, he smiled. Today, I will have a taste of the blood of gods and Buddhas to see what it tastes like. (Slaying demons + humor + traditional fantasy + single female protagonist + no system + weak introduction, please move to the main text)