"Not good!"
In the River of Time and Space, the powerful beings saw the sudden surge of destructive fluctuations and their faces turned pale. They immediately left the past without hesitation and quickly returned to the present world.
It might seem an accident that the arm of the Demonic Power of Destruction fell into the River of Time and Space, but who could guarantee that it wasn't intentional by Pangu Great God?
Perhaps it was their tampering with the past that angered the Pangu Great God. Yet, because the consequences weren't too severe, the Pangu Great God couldn't harshly punish them. Instead, he cast the arm of the Demonic Power of Destruction into the River of Time and Space to chase them back to the present, serving as a mild punishment but a grave warning.
The Great Divine Transcendents of the Prehistoric World were all sly, inferring a lot from a simple act of the Pangu Great God.