Sharpen the Sword to Kill the Immortal

Si Buqi, seventeen years old, is a heavy bag carrier in Qingyun City. A third-level mortal, without a father or a mother, is destined to die. Until he picked up a black stone strip in a dilapidated temple - it was so dusty that it looked like a whetstone. Then the Green Snake Gang chased him, seventeen people chasing him for seven miles. He survived. Since then, he slowly discovered the secret of this stone: Once the skill is put into it, it can erase mistakes and turn the incomplete "Rang Niu Jin" into a killer move. When spiritual energy passes through it, it can grind away impurities and become invincible in the same realm. If you take the magic weapon over, it can remove the mark, and the enemy's magic weapon becomes his. Injured? It can even smooth out damage to the meridians, and becomes stronger with each battle. The only drawback of this stone is that it hurts when grinding. It hurts so much that the bones feel like they are being broken one by one. But Si never gives up and is not afraid of pain. He is a man who crawled out of the mud and earns money while he is alive. From Qingyun City to the Ten Thousand Demons Mountain Range, from the third level of mortal body to the Immortal Emperor. He ran over it. Someone asked: Why do you do that? He said: Just because I have a whetstone and this damn life. If you dare to rob me, come here.