Tianyuan City had countermeasures against these spies.
The intelligence department led by Sophia, the prison managed by Rakshasa, and the surveillance department were all top-notch.
Rakshasa would occasionally patrol inside and outside Tianyuan City using the "Slaying Evil Decapitating Malevolence" talent. However, it seems these spies were too incompetent, committing 'evils' that were far from significant, so Rakshasa failed to notice them.
...
"Boom—"
The spy from the Shen Yao Empire was locked up in the Nine-story Bone Tower Prison, in the area above ground.
Not many people were imprisoned there. However, the Nether Prison underground held a substantial number of creatures from the Legendary Realm.
The strongest prisoner in the aboveground area turned out to be a man claiming to be an Earl from the Tower Federation.
However, today this middle-aged man was bailed out.