Luckily insects seemed to be very sensitive to Earth's magnetic field. Sometimes, it was almost as accurate as migratory birds' navigational ability.
"The middle one!" Chu Yunsheng quickly sent a message to his companions.
Dumb Insect and Little Red ran into the tunnel in the middle first. They were followed by other insects. Chu Yunsheng was in the middle and Old Purple was still guarding the back.
All the insect were asked not to use their fire energy to prevent from exposing their current location
Luckily, the insect's unique "sight" helped them a lot in the dark crack. Otherwise, Chu Yunsheng would definitely bump into walls many times.
The crack was getting narrower and narrower, it was also getting wetter and wetter. Without any reference objects, Chu Yunsheng could not tell if they were going up or going down.