My Immortality Begins with Slaying Demons

This is a strange world where demons wear official robes and evil spirits hide in people's hearts. When Chen Ping opened his eyes, he was at the execution ground, with the knife hanging from his neck. In desperation, the [Demon Killing System] comes: kill the monsters to stay alive and become stronger. Killing half a demon with a sword, and fighting back in desperate situations, he gained thirty days of life, and was also involved in the darkest organization of the dynasty - the Demon Suppression Department. Here, colleagues are more unpredictable than monsters, and merit and conspiracy are of the same price. The painted-skin demon is killing people in the song, and the heart-eating demon is lurking in the bodies of his companions, while the big shots in the company are watching with cold eyes. While others are practicing spiritual energy and understanding the way of heaven, Chen Ping is only doing one thing: swinging his sword. Kill one of the troublemaking little monsters, and your lifespan will increase by 10 days. Kill a century-old demon and be rewarded with ancient skills. Killing a fallen "one of our own"... The system went silent for the first time, and then a scarlet prompt popped up: [Warning: You are touching the ultimate truth of this world. Lifespan bonus:? ? ? Chen Ping wiped the blood off the knife, looked at the almost endless numbers behind the life span column, and smiled. "My path to immortality begins with slaying demons." "If all the nobles in this dynasty and the gods and Buddhas in the sky are already demons..." "Then I will create a pure and innocent world!"