Siege of the Iron Sky Kingdom (Part 2)

Having focused all of their power on trying to break through the formation as fast as possible, it did not take more than three hours before the formation started to show signs of breaking. 

Crack~

Countless small cracks that had automatically been repaired before now covering the entire formation showing no signs of disappearing. Instead, these cracks slowly began to grow bigger under the constant attacks from the three Soul Ascension Realm Experts.

Even if the formation still had an ample supply of spirit stones available, it could not keep up with the pace of the three Soul Ascension Realm Experts and had thus started to break far faster than Yi Min had originally expected. Giving her far less time to stabilize her cultivation and take control of the formation before it broke.

After all, if the formation ended up breaking, she would no longer have any way left to defend herself.