Bab 2117: "Midnight Is Coming" 

Everyone became tense again, and soon, they started to inform the warriors who were still fighting the demons outside of the barrier to return to the castle before midnight. 

Knowing that there was a chance that the natural disaster field, the sky and the ground arrays, and the barriers around the castle, might all be lost after midnight, the survivors started to use up all those large killing weapons to kill as many demons as possible. 

They could not waste everyone's effort to create those arrays, and the natural disaster field, so the only way to properly consume those things was by killing more demons in a short period of time before midnight. 

The survivors seemed to be injected with a lot of energy and out of the blue, everyone worked extremely hard to kill more demons before midnight.