Being Used as a Sacrifice, I Robbed, Killed and Cannibalized My Way into the World of Immortality

This is a twisted world where spiritual power is seriously polluted. The more you practice, the faster you will die! The more diligent you are, the easier it is to become a miasma! However, everyone in this world is cultivating immortality. The rules of this world force everyone to practice like crazy, and then... Turn into that terrible miasma! My name is Chang An, I was sacrificed by my parents, my bones and skin were removed! But I... Survived!