Demonic Cultivation: Step on Thousands of Corpses and Eventually Become the Demon Ancestor

Demonic Cultivator + Systemless + Decisive Killing + Demonic Sect + Gou Dao Chen Yan accidentally traveled through time with a mysterious jade jewel. In order to survive in the demonic sect where the weak prey on the strong, in order to control one's own destiny, one becomes an immortal and a demon. So what if he becomes a demon? When the wings are full, it will be the time when the demonic flames surge into the sky. [Realm: Qi refining, foundation building, golden elixir, Yuanying, spiritual transformation...] The introduction is weak, please move to the main text.