In fact, the Xuanwu Divine Hall has people within all of the Four Great Empires and the Zhengyi Sect.
Lei Mang from the White Tiger Empire;
Young Master Sky Wolf from the Yuelang Empire;
The Princess Consort from the Tianhai Empire;
And Hundred-Eyed Demon King Wu Leonard from the Zhengyi Sect!
However, unfortunately, Lei Mang was killed by Mu Wan Shuang, and both the Princess Consort and Wu Leonard were killed by Ling Xiao.
This has been a significant loss for the Xuanwu Divine Hall.
This means that even if there was no conflict between Ling Xiao and the Xuan Ming Sect Leader, he wouldn't be allowed to enter the Trial Grounds for the trial.
Because he does not have the qualification.
"Ling Xiao, hand over your Magic Cube Metal, and we'll allow you to stay in the Magic Cube Temple comfortably for ten days. Otherwise, the Divine Temple Sky Prison will be where you spend those ten days.
There, you will suffer the most brutal punishments."
