We Agreed to Pick up Rocks, but the Devil Exploded

Traveling through the world of cultivation, I activated the "Causal Displacement Instrument". "I defeated the devil." I declared casually. The system jingled in response: "Please collect three rotten stones." When I was holding my nose to complete the task, the Demon God above the Nine Heavens suddenly exploded. In the sect competition, I declared: "I will win the first place." Until finally, the remaining soul of the demon screamed: "Who are you?" I opened the task list, pointed at the last line "picking up bad stones" and chuckled: "Look, everything has been decided."