That roaring, surging river was precisely the second tribulation of the protective restrictions here, water of the Heavy River!
It was the heaviest vein of water beneath the heavens besides the rivers of the galaxy themselves.
After passing through the restrictions and entering the great hall of the Daoist temple, Yan Zhaoge had felt greatly fortunate after having carefully analysed the formation diagram on the yellow cloth.
When he had entered, no one had been presiding over and controlling those protective restrictions.
Therefore, the sandstorm, Heavy River and fire lotuses had merely blocked his way one by one.
He had simply needed to break through all of them one by one before being able to pass.
Even so, it had not been an easy task for him.
Still, if there was someone presiding over these protective restrictions, they would be able to simultaneously unleash two, even three of those great tribulations at once!