The sudden sound emanated from afar and surprised the crowd.
The rapid and coarse sound wasn't that of a frog. Instead, the sound was low and deep.
The sound emanated from at least several thousand meters away.
"What's making that sound?"
Everyone was taken aback as they looked towards the source.
This sound had made their hearts skipped a beat.
Several meters ahead of them was a branch of the Yellow River. For a sound to come from such a far place, the one making it would definitely be horrifying.
"Are there other mutated creatures?"
The expression on the middle-aged man in military uniform had stiffened with dismay. He looked ahead with his deep eyes before turning back and speaking to the crowd, "There might be unknown and powerful creatures ahead. Everyone, please be careful!"
The crowd kept their nonchalant attitude in check and started observing their surroundings attentively.
"Let's go! Let's quicken our pace!"