Possessed by the System, I Picked up a Leak in the World of Immortality and Became an Immortal

Traveling through the world of cultivating immortals, I became a garbage man. I originally thought that I would live a ridiculous life in a muddle-headed way. Unexpectedly, I accidentally got the fairy grass dropped from the sky, opened the system, made money along the way, upgraded, and became a human being, an immortal, an immortal, and a god.