A Vital Mistake
Following Xue Bai's completion of the Illusory Garden Formation, everyone in the trial room had slack, open jaws and eyes as wide as saucers, as they were all questioning whether what they saw was real or not.
However, between the fact that Xue Bai wasn't fading as a mirage would and that they all recognized who he was, they all started to believe it was true.
Ji Ruxi and the Kun Empire students were reluctant to accept that such a monster was born within the borders of the lower-ranked Gen Empire, but without any means to do anything about it, no one moved and continued with their own work.
The same was true for the Gen Empire side, as most people in the camp wanted Xue Bai dead, but the ghostly emperor made his rules clear. No murder would happen under his watch.
And truthfully, even without the ghostly emperor's threat hanging above them, no one was truly sure if they could kill Xue Bai.