The Cold Blade Made of Dark Iron Cuts Through the World with a Green Edge

Killer! A scary profession. When you enter this industry, the outcome is already determined. If you want to survive, you have to keep killing people until they are afraid and until they dare not come near you. But this will only make you die later, because eventually someone more powerful than you will appear, and you will eventually die under his knife. Unless you can change your destiny against the will of heaven...