After punishing Kunpeng Demon King, and ascertaining that Green Fire Demon King was not coming back, Diabolical Dragon King proceeded to announce the matter.

"Right now in Underworld Dragon's Den, we must build an Ancient Demon Dragon Perpetual Devourer immortal design. Fashioning this immortal design will require the help of many. Each of you must be responsible for your part, and I will brief you on your individual tasks later!"

Following Diabolical Dragon King's announcement, the demon kings were all confused. Ancient Demon Dragon Perpetual Devourer immortal design?

They had never heard of this immortal design before, and it sounded pretty sinister. It didn't sound like an immortal design. More like a demon design. And they had no idea how they would do it as well.

Besides, each of them would have to take charge of one part, personally assigned by the Diabolical Dragon King himself. He was evidently keeping them in the dark as to the purpose of the design. If each of them only focused on one part, it would be hard...