Immortal Bone Path

I have a knife, and one knife does good! I have a knife, and one knife is for evil! I have a knife, and I can live with one knife! I have a knife, and I will die with one knife! … Someone asked: How many knives do you have? I said: One knife! The protagonist goes from slaughtering cattle to butchering a knife, and finally becomes a king's knife! The sword of immortal bone path travels across mountains and rivers! Love, hate, and enmity in the world, join hands with fellow Taoists on the road to immortality!