Jian Dan stood before the city gates of Tianyue City, slowly moving forward with the queue entering the city.
Tianyue City was the city closest to the boundary between the immortal and mortal realms. Its city walls were about twenty zhang high, with observation posts set up at the top. Jian Dan figured that cultivators with relatively strong spiritual sense must be stationed there to easily monitor the surrounding situation.
The city walls were not simply made of ordinary bricks; every single cyan wall brick had been refined and inscribed with runes. Once all the runes were connected, they formed an interlocking city-protecting array.
Chapter 53