This Foundation Establishment Is Far Too Overpowered

In those days, the cultivation world's only truth was this: the higher your realm, the more right you were. A single word from a peak Void Refinement expert could erase an entire sect from the map. A single peak Body Integration expert could hold an entire region in check. Then they ran into a Foundation Establishment cultivator. No divine abilities, no magic treasures, no grand formation. He couldn't even fly. He just walked up and punched them, one by one. Some said he wasn't really at Foundation Establishment, that something else was buried beneath that realm. Others claimed he wasn't human at all.