The Loser Only Knows One Sword, and One Sword Can Shatter the Heavens of Eternity!

My family members died at the hands of the demons in my previous life. In order to take revenge, I continued to improve my strength, but my strength seemed to have reached a bottleneck and I could no longer improve at all. I was so decadent that I could only paralyze myself by swinging my sword continuously, day after day, year after year, without eating or drinking, and never stopped moving, until the end of my life... Unexpectedly, when I woke up again, I would be transported into the body of a good-for-nothing young master. Due to years of lack of exercise, this body was extremely weak... Swinging a sword is what I subconsciously want to do when I wake up... This is a world of swords and magic, and I am physically unable to learn magic, so I can only rely on the sword in my hand to travel across the continent... Why are there actually demons here? With the hatred from my previous life, I embarked on the path to eliminate the demons...