Limit Reached
On the other side, outside of the dungeon that the vampires were previously guarding, the number of vampires that were in charge of guarding the area had been decreased. But even then, the power level of the few that were remaining over were all in the mythical rank and above.
In fact, there was even an old vampire that had already reached the ancient rank. This was enough to demonstrate how important guarding this dungeon was to the vampires.
It might be true that the human who had managed to enter into the dungeon had already gone, but even then, they could not be sure if the human would come back again. So, it was better for them to be careful. They definitely could not give the humans a chance of rising.