Kill the Wights at the Border at the Beginning

Western Fantasy + Magic Travel through time and become a lord in the Middle Ages, with both magic and fighting spirit disabled. Accidentally awaken the money ability system, you can become stronger by using gold coins. Roger is the third son of the Lannister family. His older brothers and sisters are all very good, but he is really weak in magic and fighting spirit. As a marquis family, strength determines status. Roger's status in the family is very low, and even some servants look down on him. The king needs to open up the northern frontier, which is a place full of corpses and full of dangers. His father didn't want his brother to take risks, so Roger was used by his father. Roger Lannister was granted the title of a small baron by his father and went to the Northern Territory to develop the Northern Territory.