One Review Doomed the World!

Everyone at the Qingyun Sect on the Eastern Continent ranks below Lin Bufan in seniority, and none of them knows he is still at the qi refining stage. He arrived on the continent three hundred years ago from somewhere else and has spent the time since lying around. When the Black Demon Old Devil brings demonic cultivators against the sect, the others fetch Lin Bufan out to hold the soul-locking formation, since he is the senior present. By then he has woken a system that lets him leave a bad review on a thing and have the thing remade. He reviews the formation, the attack comes apart, and the sect starts treating him as its most valuable possession. He goes on to review pills, pill recipes and forging methods, and the cultivation of everyone around him climbs. Youluo Hall notices the change and sends its experts against Qingyun one after another, and the reviews deal with all of them. Then Lin Bufan finds the Heaven-Cleaving Sword too heavy and says so. The sword had been holding down a chaos rift, and the review loosens it. The rift opens, chaos beasts come through, and the Eastern Continent is left facing its own destruction. He takes the sword back in hand to work on it again, and the Tianji Pavilion of the upper realm arrives to claim the sword for itself.