Introduction: After three years of marriage, my life at my father-in-law's house is worse than that of a dog. My brother-in-law Su Ming could point his finger at me and call me a "waste son-in-law", but I could only obey and was assigned by him to guard the North City Gate, which was the hardest and most dangerous. Until that day, bandits were killing people in the street, and a child's cry pierced my eardrums. My mind got hot, so I picked up the spear in the corner and stabbed it. Hot blood splashed on my face, but a cold voice sounded in my head: [Ding! Kill an enemy and activate the military merit doubling system. You will gain 1 military merit point, which can be exchanged for 2 points of force. ] I froze on the spot, and then laughed. They all thought that I was stuck in mud and couldn't hold up the wall, but they didn't know that in this mud, there was a system that could swallow the whole world. When my brother-in-law came to humiliate me again, I was no longer the good-for-nothing guarding the city gate.