Perception
The phrase "When it rains, it pours," defined Hao Xuan perfectly right now.
He stood in his Mind Palace looking at his severs, scowling all the way through. His mind racing to come up with various explanations for this new complication.
The first thing he did was walk over to the white ant that was next to the podium in the center of the Mind Palace.
It was rolled up into a small ball resting right next to the mysterious black egg.
"Did you do something to me?" he asked cautiously.
He was of course talking to the Queen. It was powerful enough to hide in plain sight even when Hao Xuan severed the white ant.
The process of severing entailed the complete submission of his sever's soul to Hao Xuan's, and during it he could 'feel' almost every detail about it, no matter how inconsequential it may seem.
None of the severs had been able to hide any malicious intents from Hao Xuan, let alone another soul completely.