"Boom—"
Muffled thunder faded, black banners wafted, and within the chilly wind mingled the plaintive wails of women and children.
Upon closer examination, one would discover.
This flagpole, inserted atop the mountain and towering dozens of zhang high, was inlaid with desiccated skulls.
The Crimson Array covered the mountain gate. Those mundane souls sacrificed through Blood Refining had, after death, turned into Yin Sha spirits. As the black banners fluttered, they wailed with the wind.
The main sect of Yin Mountain had indeed sealed itself off.
However, there were many disciples under its banner, and cultivators of the Demon Sect seldom followed rules.
As for those disciples unwilling to seal themselves off with the main sect, Yin Mountain naturally wouldn't stop them—
If they didn't wish to stay in Yin Mountain, they could go elsewhere to establish their own sects!
Thus, at the time of the sealing.