C489 A Prelude to the Shocking Event of Death

Just as everyone was hesitating about what to do, deep howls suddenly came from the depths of the strange tunnel.

This sound was extremely distant, as if it came from a very distant place. Listening closely, it sounded like it was right beside one's ear, making one feel a chill down their spine!

"What is this?" Someone was horrified, and cold sweat broke out all over his body