C285 Turn over the Underworld(3)
The door to Hades Prison was extremely tough and sturdy, and the authority required to open it was extremely high. At the very least, he would need an Elder of Hades and above to activate it.
Therefore, even though they knew that something big had happened in the special area and even though they were being chased down by Bai Jin, the experts of the Underworld could only stay here