Zombies, as a special kind of Yinhun ghost creature, were not produced only in abundance in the Underworld Realm; their tracks were often seen in the Human World as well.
However, for a corpse to turn into this sort of ghost creature, the conditions were extremely harsh. All manner of coincidences and opportunities had to align, and not one could be missing.
First, the place where the corpse was buried had to be heavy with Yin energy, ideally a place of a Yin Vein.
Second, the person's birthday had to fall in the seventh month of the lunar calendar—that is, the mortal world's Ghost Festival.
Finally, the corpse had to be buried deep underground and could not rot away. Otherwise, without flesh and skin, with only a skeleton left, there would naturally be no possibility of becoming a zombie.
Not one of these three could be lacking, and thus under natural conditions, very few corpses could successfully gain sentience.
Yet now, at Baisuan Pavilion's main headquarters, the zombies that had appeared numbered in the thousands upon thousands. This had clearly already violated the Laws of Heaven and Earth.
Needless to say, it was naturally due to the influence caused by Yue'er's Nascent Soul Formation.
Thoughts turned through Lin Xuan's mind. Of course, there was no need to explain these matters one by one to the two women. Those sentient zombies were not weak in divine abilities, and their numbers were also extremely great. With the sudden change, Baisuan Pavilion's immortal cultivators had actually fallen into a disadvantage.
"As for Yue'er's Nascent Soul Formation, I will watch over it. You two quickly organize the people and exterminate these monsters one by one." Lin Xuan swept his gaze around, then spoke without shock or joy.
"Yes, we respectfully obey Young Master's command."