Now when dealing with those NPCs, the situation had indeed changed somewhat.
Both because NPCs lacked that kind of blocking ability and because the NPC high levels would not keep sending large armies into the castle indefinitely. At that time, the number of NPCs at the teleportation point was quite limited, and according to the situation at the time, Zhou Tian not joining the fight meant those NPCs had already fallen into a disadvantage in the battle against the Monster Army. With Zhou Tian now adding his main force, how could those NPCs possess any resistance at all?