While the boundaries of the Netherworld Sea were stable, the many calamities inside would occasionally break it open.
Due to the intense fight in the Netherworld Sea, it made the calamities in the Netherworld Sea more chaotic and the boundaries were further damaged.
If the Netherworld Sea went completely chaotic, then it was extremely dangerous for everyone inside. Hence, all the combatants tried to limit their attacks to the immediate vicinity of Catastrophe.
Even Xiao Yan, who controlled the Netherworld Sea, did not forget about dimensional stability. To him, the most important matter was to control the power of the Netherworld Sea instead of letting it go wild.
Earlier, the Heaven-Destroying Sword caused the Netherworld Sea to open. However, the tear was quickly healed by everyone.
Everyone was rather shocked by the sudden opening of the tear now.