C1933 Federation
The reason why he allowed the people from the Ghost King Sect to intervene was to give the people from the Ghost King Sect a bit of glory, and let them have a sense of belonging. This was Zhang Xiaofann's strategy.
"The hundred thousand disciples of the Ghost King Sect vow to serve Master to the death." Sect Master Ghost King led a few people and knelt down, looking like he was boiling with rage