Nothing happened overnight.
Since Mo Sirou had been rescued, the purpose of the Flowing Cloud Sect's visit was accomplished.
So, early the next morning, the group from the Flowing Cloud Sect prepared to head back home.
Strictly speaking, they had saved the Cloudrise Sacred Land, but more strictly, it seemed they had also brought the danger in the first place. Moreover, the disciples of Cloudrise Sacred Land were unaware of this incident, and after the heavenly lightning event, the sect was in need of manpower. Therefore, compared to their arrival, the farewell for the Flowing Cloud Sect was less grand and more subdued.