In front of Han Li and the others like Blood Poison, Mu Qing and the other three Demon Kings discussed several matters in succession.
The discussion involved things like "Profound Ghost" and "puppets," and it seemed they were preparing for something like an invasion.
However, what intrigued Han Li the most was the "Nether River Realm" they occasionally mentioned.
Upon hearing the name for the first time, Han Li's heart stirred, and he immediately thought of the Umbra Realm from back then.
But apart from mentioning the name a few times, they didn't talk about anything related to the place.
By this time, Han Li had already stepped back to one side, secretly observing these Demon Kings.
To be honest, among the four Demon Kings, what he found the most mysterious and unfathomable were Liu Zu and Di Xue the monster.
The former emitted a chillingly cold aura, strangely devoid of life. If not for his normal demeanor, Han Li might have suspected him to be a dead object.