The Forbidden Sea was endless, and the seabed was equally so.
Before Desolate's fragmented-face descended upon Wanggu, no expert in the world dared claim a thorough understanding of the seabed.
At most, their knowledge varied in scope.
This was partly because the seabed spanned a vast area, and partly because the deeper one ventured, the more layers there were. Often, what appeared to be the bottom layer was not; there might be grotto-heavens or even another sea further down.
The truth was that this sea was profoundly deep, and the seabed contained countless mysteries. Some areas were even more ancient than the Brilliant Heaven God Race back then.
Even the Great Emperors had to stop the exploration.
Whether it was the Summer Immortals back then or the successive ancient sovereigns, although they had the wish to control the bottom of the sea, they still didn't manage to fulfill it in the end.