In Li's perception, the death aura here was dozens of times denser than in the abandoned city where they had been before. It was only because they were physically strong and each possessed considerable magical power that they could endure it. If ordinary people entered this place, they would likely have died long ago.
Li frowned. "Bar, this place is very strange."
Bar slowly raised his head and looked at the black mist ahead. "I think we're in for serious trouble this time."
Li paused, then asked, "As a member of the Judgment Army, you should have encountered something like this before, right? What the hell is this? Logically speaking, based on what I know about necromancy, gathering this much undead aura isn't something a few hundred thousand people could accomplish. It would take millions. But if it really involved millions of people, there should have been a powerful king-level undead born here. Otherwise, it wouldn't make sense."
Bar nodded gently. "That's right. Under normal sacrificial methods, gathering undead aura of this magnitude would require sacrifices from at least a million people. And that would easily give rise to powerful undead. Once powerful undead appeared, though, they would consume a considerable amount of the surrounding undead aura... The two things contradict each other. I suspect someone set up a barrier here. The barrier continuously consumes the undead aura nearby, while someone keeps supplying it, creating a cycle..."
Azshara asked hesitantly, "Could it be those Death Knights?"
Bar gave a bitter smile and shook his head. "No. Death Knights can't accomplish something on this level. You have to understand, Death Knights are merely servants of liches. No matter how powerful they become, they cannot defy the lich that transformed them into Death Knights. A barrier of this magnitude would require... a