Chapter 715: A Solemn Promise

The intense poisonous fog kept surging as more poisonous gases gathered to make the fog more intense and sticky.

As expected, the involvement of the 3 Venerable Ones caused the poisonous gases to change drastically, to the extent that it could erode the Big Mountain-guarding Formation within a short period.

Nonetheless, the centipede, which had shrunken so much that it was unnoticeable, was still shaking its body and lived freely in the area where one could easily die. If it still maintained its enormous body, when the poisonous fog became this intense, it would also have the risk of bursting due to the gases.