I Started Cultivating Immortality by Absorbing Negative Emotions

Su Lin traveled through time, Good news: This is a world with a shortage of entertainment works. You can become rich and free just by copying a few books and writing a few songs. Bad news: I don't remember anything after traveling through time. Fortunately, the necessary system for time travelers is here, but this system seems a bit wrong. How can this be a system for cultivating immortals? Is this right? It seems quite right.