Ask the Grandmaster to Die

My name is Lu Ci. I woke up when I opened my eyes and found that I had become a rusty kitchen knife. Through the blade of the sword, I saw that I was enshrined on the shrine, and the tablet read: "The person who borrowed the sword, the position of the ancestors of the Lu family for generations." The villagers knelt down and kowtowed to me, begging me to bless them in killing the zombies. But I am obviously a living person, how come I have become the tablet of my ancestor? What's even weirder is that every time they burn an IOU, it will be absorbed by this knife and turned into my power. Until that day, an old man wearing a shroud walked into the ancestral hall and bowed to the tablet: "Master Lu, I paid back the salt I borrowed on credit in the 16th year of the Republic of China." What he took out from his arms was not a silver dollar, but a piece of yellowed human skin...