One of those treasures was the very courtroom they stood in, or to be specific, the entirety of the black medallion tower. The entire tower was a single entity, and either because it was built from a unique treasure such as the mimicry chaos sky metal, and countless other ascendant grade and saint grade treasures mixed in, but the tower had a sentient spirit, and it was the true protector of the judges, inquisitors and other workers that inhabited.
Why was Yang Qing always adamant about not leaving the headquarters, even when seduced by irresistible offers? It wasn't that he was a strong-willed person that could effortlessly resist temptations. He wasn't, in fact, he was self-aware that he was one of the most weak-willed people in the Order, easily susceptible to bribes. Soft life Yang Qing and Always scheming Yang Qing would not have been born if he was.