[Touken Ranbu] Why Is the Sword Spirit so Difficult?

My name is Muramasa, the ghost cook Ding, which is taken from the cook Ding Jie Niu, also known as the demon sword Muramasa. I don't know why, I don't have a master, but I can rely on my own spiritual power to transform. Why do you call me a ghost cook? Because I always have an evil nature in my body. With just one knife, I can cut a person into pieces like a cook cutting an ox. It will also corrode its own master. Each master eventually became a madman and died of suicide. I spend most of my time sleeping, and when I wake up I look at the world. After I split time and space inexplicably... People claiming to be the government of the time came to visit me and said that I had great spiritual power and wanted me to be their judge. Don't look at it, nearly seven hundred years have passed since I can remember. But I also keep up with the times! I know this setting, but I'm not familiar with it. Isn't it just Touken Ranbu... Huh? I can't remember the names of these knife masters! Why bother Dao Zi Jing! Let me go! Purpose: Charm of personality