It's time

As the day passed, the bandits guarding the main fort began to feel confused. Several Stage One demon beasts appeared now and then, just to be killed by the fort's formation. This region has a minimal number of demon beasts since it is inside the human territory. Still, they had seen more demon beasts than they would for several months.

Of course, no one was really worried about it. After all, even Peak Stage Two Demon Beasts would be powerless inside their formation. If anything, they felt annoyed that they had to clean up the beasts' corpses. After one entire day, almost a hundred Stage One demon beasts died for the formation. 

But then, it stopped. During the next day, not a single demon beast charged into their formation anymore. As weird as the event looked, the bandits keeping guard of the fort soon forgot about it.