Spreading the news that the Painter was in Xu Chao's hands would prompt restless overseas forces to go deal with Xu Chao. Killing him outright was impossible, but it would at least stall him.
Immediately after, the news that Nalan Fengtian was about to be taken to Long Lord Manor was leaked, and the people of Tianji would naturally not let this opportunity slip, willing to take the risk at all costs.
After all, once Nalan Fengtian was controlled by the authorities, they would lose all hope of getting the key to the Tomb of Emperor Wu of Wei!
Chapter 148