Everything returned to silence again. Ah Dai looked at everyone in confusion and said, "Why is there only one? Is this what's called the undead army?"
Kino's eyes suddenly showed a look of fear, "Quick, look over there, what is that?"
Ah Dai was startled and turned to look in the direction Kino pointed. In the distance, a large gray mist seemed to drift toward them slowly yet quickly, and a faint buzzing sound seemed to emanate from the mist. Ah Dai focused his eyes on the gray mist. When he saw it clearly, he couldn't help but take a cold breath. It was not a gray mist at all! It was actually composed of countless bone birds, identical in shape to the single bone bird they had seen earlier. Since their bodies emitted a gray fog, at first glance, they looked like a mass of gray clouds.
"It's a large flock of gray bone birds, everyone be careful."