Leaving aside how the war in the Primordial World unfolded, not long after Demon Emperor Daochen departed...
He received a prompt from the Little Demon Emperor. "Oh, there are missions in the Primordial World. Which one should we choose?"
"There are two: venture deep behind enemy lines and hunt down the white-robed commanders, or defend the Primordial World against the black-robed army."
"Both missions are equally important, but I recommend hunting down the white-robed commanders. Without those white robes directing them, the combat strength of the army of Black-Robed Men will be greatly diminished."
"Once those fellows lose their commanders, I doubt they'll pose a threat to the Primordial World."
"Besides, there are plenty of powerful cultivators stationed in the Primordial World now. If they can hold it, they will. If they can't, going back won't help."
The Little Demon Emperor's words left Demon Emperor Daochen somewhat stunned.
"They actually attacked at a time like this? Did you deliberately lure me away so we could choose a mission?"
The Little Demon Emperor scratched his head. "As your attendant, I have a duty to help you choose the best mission, Demon Emperor."
"Defending the Primordial World would mean hunting down some low-ranking Black-Robed Men at most. Although they're still very strong, relatively speaking, they won't do much for you."
"But hunting down these powerful figures is different. The benefits they can bring far outweigh those of the low-ranking Black-Robed Men."
"We might even get plenty of useful information out of those white robes. Who knows? We might be able to wipe out the Black-Robed Men in the future."
Although he knew that hope remained slim-after all, they had gone unresolved for countless generations.
Still, it was a glimmer of hope. One more was better than none.
Demon Emperor Daochen fell silent.