Taking the slap, the already critically wounded black-clothed man convulsed and fainted on the spot. Lin Xun unceremoniously searched his body and grabbed his storage treasure. After a quick inspection, he found two life orbs, which he kept before throwing the storage treasure back with the rest of the items untouched. “He went back on his word, yet you spared his life and only took two life orbs?” The green sparrow was stunned. “How long do you think he can still jump around the Ancient Nightmare Battlefield with this kind of injury?” Lin Xun said, “As for why I only took two life orbs... Well, it's called keeping one's word.” Then, he looked into the distance. With the five dao bodies deployed together, the group of Emperors that had lost their two Ninth Realm Ancestor guardians had quickly been routed. In the end, only two of them managed to slip away with their lives amidst the chaos. After clearing the battlefield, Lin Xun gained a large pile of miscellaneous treasures and three more life orbs, all of which had come from one of the Ninth Realm Ancestors. At this point, he had not only gathered enough ten life orbs, but also had a surplus of two... He made a grabbing motion, and ten life orbs appeared in the air. After a little bit of refining, they formed a blood-colored spirit ring wreathed in lighting awns. Within it contained fiendish qi. This was a thunderfiend ring. The moment Lin Xun put it on, he felt a marvelous echo between it and the Bloodfiend Astral Thunder that covered the sky. “A thunderfiend ring can be used by ten people, but you have one all to yourself. How extravagant!” teased the green sparrow. “Are you human?” Lin Xun asked out of nowhere. The question actually had the green sparrow stumped. To this, Lin Xun only smiled. Without delay, he then teleported upward. The sky dome was filled with lightning and thunder. Fiendish qi tumbled like a canopy, covering this ancient battlefield. When he approached, all of a sudden, the lighting and fiendish qi abruptly rolled to two sides, creating a path that led straight to the void beyond. Lin Xun instantly became focused and shuttled right through. Passing through the canopy, he felt as though he was passing a world barrier due to the illusion of whirling stars filling his vision. The next moment, he found himself in a dark universe. Grayish-white undead qi shrouded this piece of void like a fog, emitting a cold, depressing, and suffocating air. Broken landmasses floated in this fog, faintly visible but one could not tell where they ended. There would be bursts of ghostly sobbing every now and then. Resounding from the depths of the void, they were indistinct. Even when one listened carefully, it was still impossible to locate their source. The green sparrow informed him, “This is the Undead Soul Domain. It buries the power of the Ancestral dao origin from the last epoch. “Many experts have entered this place over countless years, but the Ancestral dao origin here still has not dried up. “On the contrary, more will emerge at intervals, so you don't have to worry about finding opportunities here. What you do need to worry about is fighting over them. “Apart from this, there is a kind of fiend spirits distributed throughout the Undead Soul Domain known as the undead. According to the rumors, the obsessions of some most powerful experts still lingered after the destruction of the last epoch, and those obsessions ultimately turned into undead. “Undead Monarchs are the most terrifying among these; the battle power of the weakest ones being at the seventh realm Emperor Stage. They are permeated with a kind of bizarre obsession that can quietly invade a cultivator's mind. “Even a Ninth Realm Ancestor would go berserk once they are tainted by such an obsession, and there are many historical examples of this. “As for the average undead, they aren’t too strong, but still, you mustn't be careless. There have been quite a few Emperor experts who got hunted down and killed by the undead in the past.” Learning all this, Lin Xun inwardly put his guard up. He asked, “What about the Ancestral dao origin? How should I find it?” “You find it by luck,” said the green sparrow. “Remember, everyone who enters the Undead Soul Domain only has a month. Those who don’t leave after a month has passed will be exterminated by the Undead Storm, and no one, at least at the Emperor Stage, can survive it.” Lin Xun's eyes narrowed. A moment later, his figure flickered as he teleported toward the depths of the cold, silent starry sky covered in grayish-white fog. Fragments of land floated in the void. Some only expanded a thousand feet or so, while others went up to thousands of miles. Most of the landmasses were jagged and barren without an inch of green color. Meanwhile, some of them were ridden with sword holes, axe marks, and mottled ruins, emitting a bleak and heavy atmosphere. Those were obviously left behind by world-class battles and had survived the erosion of time to this day. Lin Xun suddenly sensed something. An illusory figure had just glided out from the fog without making a single sound. Upon closer inspection, the being’s appearance was extremely blurry. It was impossible to make out its features as it was permeated with wisps of undead qi. Like a ghost, it emanated a bizarre air. The fog churned as the figure stormed toward Lin Xun, making a hand seal and shooting it at him. The seal was imbued with a dense, ghastly aura. The power it released was just as eerie, and grayish white in color like the atmosphere of hell. The figure was an undead! Lin Xun waved his hand, sending a radiant light whistling. With a loud noise, it directly smashed the undead into wisps of gray mist. An uncanny scene ensued. As if alive, the thousands of gray wisps tore through the air as they shot toward Lin Xun. Their speed was unimaginably fast! There was a burst of urgent explosions as Lin Xun controlled dao light to flow around him and ground those wisps into dust. Lin Xun understood, “This power should be the obsession left behind by the powerful experts of the last epoch. It's not too terrifying, but it’s incomparably bizarre and must not be touched...” He proceeded to keep going to conduct his search. The Undead Soul Domain was utterly vast. According to the green sparrow, it wasn't much different from a small plane. Lin Xun then got attacked by quite a few undead but still hadn't found any Ancestral dao origin along the way. The attackers varied in power, with strong ones being on par with sixth realm Emperors, and the weak ones as strong as third realm Emperors. These undead naturally posed no threat to him. However, he didn’t dare to be careless because upon destruction, every undead would transform into a strange obsession power that tried to invade his body. Such a force was incomparably wicked and treacherous, so he had to guard against them with all his might lest he be touched by the smallest wisp. Two hours into his search, although Lin Xun had encountered a lot of undead, he hadn’t seen any other cultivators. From this, he reckoned that even if he wasn't one of the first to enter the Undead Soul Domain, he definitely wasn’t far behind. Shortly afterward, a certain landmass caught his attention. It was not too big, only several dozen miles in area. At the center area, there was a massive ravine. A thick, grayish mist filled the ravine, making it impossible to see what was inside. However, Lin Xun’s spirit sense keenly perceived a beautiful, colorful halo deep under it. Vaguely visible one second and disappearing the next, it was difficult to be detected. Lin Xun immediately shuttled across the void. Swiftly arriving above the ravine, he peered down. This time, he had the All-Seeing Eye activated. He immediately pierced through the mist and found that the ravine was several tens of thousands of feet deep. It was almost indistinguishable from an abyss. At the bottom of the ravine was that colorful halo. Bright and dazzling like a small sun, it was diffusing a strange dao power. Ancestral dao origin! Lin Xun's eyes lit up. Although he had never seen this divine object, he could still make a rough judgment. Taking a deep breath, he shot toward the ravine bottom. Instantly, the thick mist violently swirled. From it, undead swept out one after another, densely packed and seemingly without end. Only then did Lin Xun notice that there were many caves on both walls of the ravine, just like a beehive. The undead were coming out from those. Without much time to think, he urged the Limitless Abyss Sword Cauldron while charging down. A fierce battle erupted. The undead acted fearlessly, and their strength was all between the third and sixth realm. Any other Emperor expert would have already shrunk back and fled. Lin Xun, however, crushed his way through like splitting bamboo. Wherever he passed, undead figures exploded in succession. They would then become a strange obsession force and continue to pursue him, only to end up being wiped out, unable to hurt him one bit. To Lin Xun’s surprise, though, there were countless undead under this ravine. It was as if he had intruded on their family reunion. He did not retreat and kept charging. No matter how many undead there were, they were ultimately not a big threat to him. Seeing as Lin Xun was about to get close to his target, a demonic, icy, and terrifying power swept out and locked onto him. An inky figure bolted out from the ravine bottom. Its skinny frame was clad in a dao robe condensed from undead qi, and its hair was coiled in a high bun. This coupled with the dao sword in its hand made the figure look like a monk. Whether it was the robe, the sword, or even the bun, they were all made of undead qi. What stood out was the figure’s eyes that resembled a pair of black vortexes and flickered with a spectral, hollow luster. This was an Undead Monarch! Lin Xun narrowed his eyes. Shooting out from the mist, the monk chopped out its sword, sending out a black, bizarre sword qi that ripped the void with unparalleled sword intent. It vaguely revealed the might of an eighth realm Sword Emperor! Only, that sword intent was unearthly spine-chilling. Without hesitation, Lin Xun fought back with the Limitless Abyss Sword Cauldron. The black sword qi exploded. At the same time, the Limitless Abyss Sword swept out from the cauldron with a buzz, blossoming with infinite brilliant sword qi that enveloped the area. The rolling mist was annihilated, and the void burst like it was crumbling. The Undead Monarch monk was directly chopped into pieces and turned into a big rain of black light. Terrifyingly, those black lights did not dissipate right away, but instead coalesced into a sword covered in outlandish runes for a second before vanishing into thin air. Lin Xun's face slightly sank. The Limitless Abyss Sword Cauldron suddenly erupted with endless radiance and blocked his front. There was a deafening collision as the sword cauldron narrowly blocked the outlandish sword, breaking and annihilating the latter inch by inch. However, the force released from the shattered sword rattled Lin Xun, causing his blood to churn. He stumbled, almost pushed back by it!