The Descending Heaven Holy Emperor's power was definitely not limited to mere legends. After him, every generation of Great Emperor would feel rueful and highly revered the Descending Heaven Holy Emperor, proclaiming him as one of the most powerful Ancestral Kings in history.
Because he had spent his whole life pacifying the darkness, the Descending Heaven Holy Emperor didn't even have any descendants or heirs. All of his knowledge was buried in the Needless Mountains.
However, no one knew where the Needless Mountains were. After so many generations, it was still a mystery.
Thus, the only clue was the Mountain Sea Heaven This was the bridgehead that the Descending Heaven Holy Emperor had used for battle in the past. It was equivalent to a chariot. According to rumors, when the Descending Heaven Holy Emperor had died, he had once said that the Needless Mountains lay within the Mountain Sea Heaven.