"I'm going to tell you about the second matter, and it's directly related to this Immortal Demon Battlefield."
Nirvana Empress's expression suddenly turned extremely grave.
That gravity was even greater than when she had spoken of Ning Hongye's life and death.
This made Xiao Yang and Xiao Wuji's hearts tighten as well.
What terrifying matter could make such an ancient and powerful existence reveal an expression so solemn?
"Senior, please tell me."
Xiao Yang's voice was low.
"The reason the Immortal Demon Battlefield became the Immortal Demon Battlefield is that it was the site where the ultimate battle of the previous epoch erupted."
Nirvana Empress spoke slowly.
"That point, the heir of the Heavenly Secret Pavilion should have already told you."
Xiao Yang nodded.
The Nameless Old Man had indeed said that the fuse for the Immortal-Demon War was the Immortal Slaying Sword in his hands.
"But he probably didn't tell you who the true opponents in that ultimate battle were."
Nirvana Empress's gaze fell upon the Immortal Slaying Sword behind Xiao Yang, and her eyes became extraordinarily complicated.
"On the surface, that great battle was the final clash between the Immortal Realm and the Demon Realm,
but in reality, it was the Immortal Slaying Sword Master of that era joining forces with nearly all the Immortal Emperors of the Immortal Realm to hunt down a taboo-like existence."
Xiao Yang's heart jolted violently.
An existence that could make the Immortal Slaying Sword Master join forces with all the Immortal Emperors to hunt it down?
What kind of terrifying monster had it been?
"That existence's name was—"
Nirvana Empress spoke each word with immense gravity, uttering a name that seemed to cause the temperature throughout the valley to plunge more than ten degrees in an instant.
"Luohu."
"Demon Ancestor, Luohu!"
Demon