The yellow sky clan

From the size of these cities, one could imagine how prosperous the immortal-level battlefields were in the distant past. There were many living creatures that were even divided into different forces, different races, and different countries.

Each force occupied a large territory and built a giant city with small cities around it.

Now, those living beings had all disappeared, leaving behind countless cities as strongholds in the Yang realm and the yin realm.

The main city had another irreplaceable function, which was that it had an ancient teleportation array to leave the immortal level battlefield.

That's right, it was easy to enter the immortal level battlefield, but it was difficult to leave. One had to leave through the ancient teleportation array in each main city.