Night Demons had already started running outside, but as daylight had arrived, going out meant certain death. They had no choice but to endure the discomfort and return. Lightning and Blacky were blocking this path, cutting them off and slaughtering them.
For Wang Tao and his group, the air-raid shelter terrain was somewhat advantageous. Just the two animals, Lightning and Blacky, could block the path, so they didn't have to worry about Night Demons sneaking up from behind to ambush them.
However, this terrain also meant that Wang Tao couldn't use the Beetle Armor. After all, the Beetle Armor was too large and might get stuck in the tunnel, turning it into a sitting duck! Otherwise, if Wang Tao used the two Beetle Armors he had, it would significantly increase their combat power.
Of course, even without the Beetle Armor, it wasn't a big problem.