Boundless

Only after having seen this map did Sima You Yue realise how big the Devil Realm was. The places where people were populated were also divided into regions like the Human Realm. However, they weren't divided into the inner regions and outer regions like the Human Realm. They also weren't like the Ghost Region where they had the Soul Regions and Abyss of Hell. On the contrary, they seemed to have the pre-existence of past life, but for the sake of convenience, it was called ridges. 

This could be why the Devil Realm had always been under the rule of the Devil Emperor. 

Sima You Yue counted, the Devil Realm had thousands of ridges. Wu Lingyu only had less than a thousand subordinates. When she thought about the situation he faced, it was grim. 

This severe situation was not without a breakthrough, as long as the Devil King Mo Lou was destroyed, this matter would be much easier to handle. Few of those Royal clans would stand out.