Master, Are You Really Practicing the Ruthless Way?

I was born with a sword and am the most proud disciple of my master. He treated me like a treasure and taught me all his life's cultivation. Until I blocked a fatal blow for him and my spiritual roots were completely shattered. He hugged me and his eyes were red for the first time: "Silly disciple, what I practice as my master is the ruthless way..." "Your existence is my fate." A hundred years later, I returned to the Immortal Sect as a demon king, pointing my sword at the common people. But he abandoned his orthodoxy and knelt in front of me: "This time, it's me who will be the one to blame."