At the same time, within the Holy Palace on the Demon Realm's side, a group of Demon Emperors were equally furious.
The Unreturning Demon Emperor of the Nine-Star Demon Hall slowly spoke: "Fifteen Demon Kings, all killed, this is a severe provocation to my Demon Realm!"
The projections of the other Demon Emperors also ignited with anger.
"This matter must be thoroughly investigated!"
"Investigate? What's there to investigate?"
"Exactly, no need to guess, it's the work of the Immortal Alliance."
"It seems the Immortal Alliance thinks our recent attacks are not forceful enough."
"War! We must go to war!"
They immediately targeted the Immortal Realm for revenge.
Soon, on the Demon Realm's side, the major top Demon Sects began mobilizing.
Groups of Demon Venerables and Demon Kings headed towards the frontline battlefield of the Immortal and Demon Realms, including Quasi-Emperors.
Behind them, the shadows of several Demon Emperors loomed.
