Xu Yuan and the others reached the depths of the Dark Forest, but they still didn't see any Skeleton Cave around.
Xu Yuan searched for the exact location of the Skeleton Cave with his spiritual vision. That way, he could find the Skeleton Cave quickly. Still, unfortunately, when he was about to use his spiritual vision, it was as if an invisible barrier prevented his vision from being used.
"*Ahh~ahhh..."
"Ahh~ ahhh*..."
Suddenly his ears caught a soft hum that calmed his heart, and it came from the depths of the Dark Forest, deeper still it seemed.
He turned his head towards the City Lord, "City Lord, did you hear someone humming just now?"
The City Lord frowned in astonishment and asked in return, "A humming sound? No, I didn't hear anything," he replied.
"But just—"
"*Ahh~ahhh..."
"Ahh~ ahhh*..."