To establish a foothold in the Seven Realms Martial Capital, the security company team's overall strength was not weak.
The security team entered the underground passage, cautiously advancing forward.
At some point, the lights in the underground passage, which were supposed to be lit 24/7, gradually went out.
Darkness filled the front.
The security team members all turned on the search lights mounted on their guns.
Soon, the handheld Black Fog signal detector started buzzing with warning beeps.
"There's a clear Black Fog signal up ahead. Everyone, be alert."
The leading lower-tier martial artist at the front seemed to sense something and gradually slowed his pace, signaling the security team behind to stop and hold position.
A faint hissing sound came from the darkness ahead.
It sounded like something rapidly rubbing against the ground.
The sound grew more intense.
The captain of the security squad fixed his gaze on the darkness ahead, adopting a combat stance.
