MC will actually reveal how he manipulate aura by using the technique from the murim world and dragged down the name of Alexander as the pioneer of aura and shocked everyone who attended the exhibition even Alexander himself. But Mc was not worried to share this cause its only the basic he thought, how to improve it or get stronger depends on who is learning and training but for others it was already revolutionary idea. Now regarding the spies ..they were some who already admitted to be spy but still betrayed Dmitry so they were captured and tortured while those who stayed and later admitted the truth was helped to save their families from Kronos empire and sworn loyalty to Dmitry.

The priest is not so bad, he's also a victim in this situation, the real villain is the new lady trying to become the saintess when she just stole the symbol using the priest's powers. The spoiler is that she is supposed to be the daughter of the high priest but is not. The high priest was also deceived.