The Sect Has Been Wiped Out for Three Hundred Years, but I Am Actually a Peerless Power

Traveling through the world of cultivating immortals, Chen Mo was bound to the Immortal Cultivation System - as long as his cultivation level was not exposed, his cultivation speed would be increased ten thousand times. So he kept his name anonymous and worked as a sweeper in the Qingyun Sect for three hundred years. Three hundred years later, he was at the peak of the Mahayana period, only one step away from ascending, but he was still the unknown old man sweeping the floors. Until the old monster in the god transformation stage bloodbathed the sect, no one in the whole sect could stop him. Chen Mo reluctantly put down his broom and slapped the old monster to death. "It made me sweep the floor." The whole place was dead silent. Since then, the entire world of immortality has been guessing - what is the origin of that scoundrel from the Qingyun Sect?