Just as the two City Defense Army members were talking, the ghost had already arrived at the city wall.
It pressed its body tightly against the wall and then slowly drifted toward the top of the wall.
Its movement was not fast and completely silent, even the Guardian Beasts on top of the wall did not notice it.
Soon it arrived near the wall top, its figure blurred and its speed suddenly increased, appearing on the wall top in the blink of an eye.
At this moment, the City Defense Army only realized when the ghost appeared.
Just as they were about to launch an attack, the ghost suddenly opened its huge mouth, and a sharp scream spread in all directions.
Everyone felt a piercing pain from their souls, and some of the lower Realm City Defense Army members fainted directly.