The loss of the Water Spirit Pearl deprived the Dragon Clan of a supreme treasure capable of suppressing their Karmic Luck, while also stripping them of a powerful trump card.
At the same time, the Dragon Emperor was severely injured, and there was simply no way to heal himself in the short term.
According to the Dragon Emperor's calculations, his Three Calamities and Six Tribulations would arrive in at most a hundred years.
Chapter 810