The aristocratic families of the Empire had suffered a great loss in the starry sea, so they didn't know much about the beast King.
However, the fact that the starry sea was able to stand against the Shi family in the Empire's territory and live in harmony with them instead of being ruled or subdued by them was a Testament to the starry sea's strength.
That beast King had already reached the peak of the eighth level several decades ago. After all these years, as the older generation of the clan who had dealt with monstrous beasts went into hiding and the new generation rose, they had forgotten the lessons of the past and did not have a deep memory of the casualties of the clan.
Therefore, when they were chasing after song qingxiao, Chu Yi and Wei Zhi tried to break through the border gate due to their ignorance after song qingxiao escaped into the starry sky sea.