The Exorcist Is Just a Cannon Fodder [Crossover]

I started this story a few years ago, and now I'm back to fill in the hole. The Master Is Cannon Fodder He used to be the most useless Master imaginable. Xia Liu woke up one morning in a citadel. He thought he had transmigrated into the game and was moved to tears. He'd finally collected every sword, and now he could meet the real ones!!! The moment he opened the door, he received all of the original owner's memories. Looking at his starter sword, Yamanbagiri Kunihiro, waiting outside, Xia Liu sobbed and couldn't help cursing: "This crappy game has ruined my youth!" He had actually transmigrated into a fanfiction as cannon fodder, and the original version of him was an absolute scumbag. He was addicted to gambling on sword smithing, abused the short swords, and never treated injured swords unless they were all but dead. He was like a wicked stepfather, tormenting this poor bunch of little cabbages. At long last, he forged the head of the Awataguchi family, the four-star oodachi Ichigo Hitofuri, only to kill him with a single slash not long afterward. Xia Liu crouched in the corner, trembling. This isn't my citadel!! Give me back my citadel!! Excerpt One Xia Liu stared in horror as someone drew closer and closer. "W-what are you doing?!" The man approached slowly, holding his prized possession, and smiled faintly. "My lord, my true form is a National Treasure. Would you like to see it?" "Y-you! Put your big treasure away! I don't want to see it!" Theme: Self-reliance