C256 Defense Infiltration System

"Hum ~"

With a light sound, a piece of the ground in the corner in front of Bing Xuanxin suddenly caved in. Immediately after, a black square hole that could allow one person to enter and exit appeared. This was a straight path down. A metal ladder was fixed on the wall. The bottom was about three meters away from the ground.

"You guys go down first." Bing Xuanxin said coldly.

"Okay