This was a very large castle. Without considering the internal space, it could hold thousands of people; with the internal space, this Castle could hold even more people.
The most important thing was the shape of the castle. It was not a square city that people used to see, but a pentagonal castle. The entire outer shape of the castle looked like a tower shield with different corners.
The void fortress was definitely the Ji family's killing weapon. It was the one that the Ji family had relied on to defeat the fan family, so the void fortress was very famous in the void realm.
There were many cultivators standing in the void fortress. Most of them were from the Ji family, and some were from other families, but they were few in number, which could be seen from their clothes.