Reincarnation System: I Have Lived for Three Hundred Lives

I was killed three hundred times by Tiandao as a guinea pig, and I became the only person who remembered all reincarnations. In this life, the Confucian sage fished me out of the "millstone": "Boy, go to the capital to find me." I was bound to the system, and he asked me to practice in a low-key manner, I said "Yeah", But something felt wrong. Then he stabbed the Great Yuling Demon with a sword and dragged his body into the city to sell it for money. People in the capital say that I am the successor of Confucian sage. But only I know that the old man, the Confucian sage, also climbed out of the "millstone" back then.