Chapter 1816: Immortal Astral tenth sun, the person named Wang Lin.

Liu Zhiyuan's retreating body collapsed with a boom from a punch Wang Lin delivered from several hundred zhang away, turning into a mass of flesh and blood that fell toward the ground. His Primordial Spirit was even more twisted, shattering directly under this strongest strike from Wang Lin.

Only his head was swept up by a great force and headed straight for Wang Lin. Wang Lin grabbed it, put it away, and his body flickered, disappearing from where he stood.

The instant Wang Lin disappeared, the entire battlefield suddenly fell silent. The shrill sound of Liu Zhiyuan's death echoed in all directions!

The Green Devil Continent Empty Tribulation Realm Middle Stage Old Man surnamed Zhang, who was fighting Lü Wenran, shuddered. Ignoring Lü Wenran in front of him, he retreated rapidly. Lü Wenran's gaze narrowed as he heard the shrill scream before death.

"An Empty Tribulation Realm Cultivator, killed in battle??"

"Liu Zhiyuan!!" The Old Man surnamed Zhang retreated rapidly, arriving at the place of Liu Zhiyuan's death in the blink of an eye. Looking at the flesh and blood covering the ground, his pupils constricted. He knew clearly the relationship between Liu Zhiyuan and the Dao Demon Sect Sect Master, and seeing his death now, his mind was shaken.

The Old Man surnamed Zhao, who was fighting Yan Luan and the other two, also retreated regardless of everything. In the instant Yan Luan and the others were stunned by the scream, he arrived at the place of Liu Zhiyuan's death.

"Liu Zhiyuan… is dead?"

The three Empty Tribulation Realm Early Stage Cultivators from the Green Devil Continent also retreated, approaching together. Their faces were pale, and their eyes revealed expressions of disbelief.

Besides them, everyone on the Extreme Heaven Grassland who heard Liu Zhiyuan's shrill scream before his death was shaken, their eyes revealing expressions of horror.

"An Empty Tribulation Realm Cultivator has died!!"

"That sound… that sound sounds very much like Elder Liu!!"

"To think an Empty Tribulation Realm Cultivator was killed in battle!!"

An uproar immediately echoed. It was rare for an Empty Tribulation Realm Cultivator to die!

"Retreat!" The Old Man surnamed Zhang's eyes revealed a cold light. He flicked his large sleeve, and his Divine Sense whistled, spreading in all directions. He turned into a long rainbow and fled rapidly. The people beside him immediately followed, leaving in the blink of an eye.

Lü Wenran did not pursue. Instead, he looked at their backs, lost in thought.

"This dead person must have an extraordinary status… But, who killed him?"

Xu Dongde's gaze swept across the surroundings, and his brows furrowed. He did not know who had killed the enemy's Empty Tribulation Realm Cultivator, but his heart was quite shocked at this moment.

"To kill an Empty Tribulation Realm Cultivator in such a short time… who is this person!"

Only Yan Luan had her pupils constrict. She vaguely sensed some clues, and her right hand inside her sleeve trembled involuntarily.

"It is him…"

Following the retreat of the Empty Tribulation Realm Cultivators, the thousands of Green Devil Continent Cultivators still alive here fled in fear, rushing into the distance in the blink of an eye.

"Return to the underground palace and defend strictly. The enemy will definitely launch a second attack. We only need to defend within the fog; do not pursue!" Lü Wenran flicked his sleeve, his gaze sweeping across the surroundings.

"Who could it be…" In silence, he took a step and merged into the earth, disappearing.

Immediately after, all the Tianniu Continent Cultivators in the fog, amidst this sudden change, merged into the earth one by one and disappeared.

Beneath the Extreme Heaven Grassland, where the underground palace was located, nearly ten thousand Cultivators had gone out, but fewer than four thousand returned. These four thousand people were all silent. After returning, they all went back to their respective Immortal Caves to prepare for the upcoming battle.

Wang Lin also returned to the underground palace with these thousands of Cultivators. His face was pale. The battle with Liu Zhiyuan hadn't lasted long, but it had been an extremely difficult battle for Wang Lin. He had calculated everything, including the order of his strikes and the opponent's reactions, while taking advantage of the exhaustion of the opponent's Immortal Astral Qi and the cooperation of the fog Formation.

It was only because of these various conditions that he was able to kill Liu Zhiyuan. Even so, he was also injured. At this moment, his chest was throbbing with pain, and he needed to heal as soon as possible.

"This is the first Empty Tribulation Realm Cultivator I have killed… Empty Tribulation Realm Cultivators are too hard to kill!" Wang Lin fell silent. If not for the Heavenly Ox Formation here, he feared that killing the opponent would not have succeeded.

Wang Lin had long anticipated that others would not notice who had attacked when he killed Liu Zhiyuan. In fact, when he attacked, in order to prevent the opponent from escaping, he had already contracted the Compass Restriction Formation around the area where he and Liu Zhiyuan were fighting. With this Formation and Restriction in place, even if others' Divine Sense entered, it would mostly be blurred and unclear.

Therefore, even the Soul Summoning Technique, summoning the ninth ancestor of the Great Soul Gate, Luo Yunhai, would be very difficult for others outside that Restriction to detect.

After all, Wang Lin had many secrets, and there were some methods he did not want others to notice, which was why he had used that Restriction to make it impossible for outsiders to perceive things too clearly.

At this moment, in this underground palace, endless speculation arose in the heart of almost every Cultivator. They were all pondering who it was that had killed one of the enemy's Empty Tribulation Realm Great Venerables!

In the main hall of the underground palace, Lü Wenran, Yan Luan, and four other Empty Tribulation Realm Cultivators were sitting there, silent. Beside them were the three old men from this place who had previously looked down on Wang Lin.

These three old men were now filled with shock. Clearly, they found it unbelievable that someone on their side had killed an enemy Empty Tribulation Realm Great Venerable. If this had been done by Lü Wenran, they could accept it. Even if it had been done by the other Empty Tribulation Realm Cultivators here, it would be understandable. But clearly, the person who killed the Green Devil Continent Great Venerable was not any one of them. So, who exactly was this person!

"I didn't see clearly. During the battle, the Cultivator surnamed Liu retreated, seemingly wanting to consume a Medicinal Pill to replenish his Immortal Astral Qi, and then the sounds of fighting came from there."

"During that time, I also scanned with my Divine Sense, but there was a Restriction there. After my Divine Sense entered, everything was blurred and unclear."

"I also probed with my Divine Sense, but I didn't discover anything either."

The three Empty Tribulation Realm Cultivators from nearby Sects spoke slowly to each other. Their expressions were filled with confusion and wariness. They were confused about who had killed the opponent, and wary of the fact that it took such a short time to kill an Empty Tribulation Realm Cultivator, who was reputed to be indestructible—what kind of cultivation did that require!

Cultivators who had passed through the nine Mysterious Tribulations and entered the true Empty Tribulation Realm were, to a certain extent, called immortal and indestructible! "Immortal" referred to their long Lifespan, almost equal to the Lifespan of heaven and earth; "indestructible" meant that Empty Tribulation Realm Cultivators were extremely difficult to kill!

"Then who could it be…" One of the three old men whose cultivation had not reached the Empty Tribulation Realm, and who had previously looked down on Wang Lin, muttered.

"It seems that among the Cultivators outside, a powerful expert is hidden…" Lü Wenran's gaze swept over the crowd. He did not believe that the people before him could kill a Cultivator of the same level in such a short time.

As his gaze swept over, he suddenly thought of one person, his pupils constricting, but he quickly abandoned this thought, which he felt was absurd.

"It can't be him, he can't do this!" Lü Wenran thought of Wang Lin.

"Alright, since this person does not want to show himself, then do not go looking for him. This matter is ultimately a good thing for us, and this person might show himself soon!" Lü Wenran's expression was gloomy. What he disliked was that within the third cave he was guarding, something had happened that even he could not grasp or detect. This point made his mood somewhat turbulent.

"Is it possible that the person who attacked is not here, but was just passing through this place during the chaotic battle…" Xu Dongde frowned and suddenly said.

Once his words were out, everyone around immediately began to ponder. Lü Wenran was stunned. After thinking carefully, he felt that this was also very possible, as he did not believe that any of the Cultivators here, besides himself, could do this.

The same scene was occurring outside the Heavenly Ox fog on the Extreme Heaven Grassland. At the edge of the grassland, thousands of Green Devil Continent Cultivators were sitting cross-legged in silence, scattered about. In the center, with the two Empty Tribulation Realm Middle Stage old men as the leaders, they were conducting an inquiry regarding Liu Zhiyuan's death.

"Since the war between my Green Devil Continent and the Tianniu Continent began, it's not that no Empty Tribulation Realm Cultivator has ever died, but to watch one die with one's own eyes, and then not even know who killed him after he is dead, that is a first!" The Old Man surnamed Zhang's expression was extremely gloomy, containing fury and even a tremor of fear. He did not know how furious the Dao Demon Sect Sect Master, who had sealed his Divine Sense for many years and had been in seclusion, would be if he found out about this.

"Elder Liu's status…" Among the Empty Tribulation Realm Cultivators who had been fighting alongside Liu Zhiyuan, someone spoke in a low voice, not finishing their sentence.

"Put the matter of status aside for now. Think back carefully again. Are there any clues? How could such a thing happen in such a short time!" The Old Man surnamed Zhao sighed inwardly and spoke slowly.

"Elder Liu retreated at that time to consume a Medicinal Pill. We were blocked by the fog and couldn't see clearly, but soon, the sounds of fighting came, and the fighting ended in less than the time it takes to burn an incense stick…"

"Divine Sense could not probe inside. There was a layer of Restriction barrier…"

"However, I noticed that Elder Liu took out his Magic Treasure, drawing in countless grievances to condense…" Several people spoke up, describing the scene at that time.

"Elder Zhao, I have a discovery…" As everyone was speaking, a woman who had been silent the whole time suddenly said.

This woman was one of the four who had been fighting alongside Liu Zhiyuan against the three Tianniu Continent Empty Tribulation Realm Cultivators. Her expression was somewhat hesitant. When she spoke, the moment the Old Man surnamed Zhao looked over, she gritted her teeth.

"The thing that blocked our Divine Sense from probing, besides the Heavenly Ox fog, was another layer of Restriction. This Restriction… should be the Void-Severing Restriction Formation of the Restriction Demon Sect!"

"I have come into contact with this Formation before, so I shouldn't be wrong!" Once these words were spoken, the surroundings immediately fell silent, and everyone's gaze focused on the Old Man surnamed Zhao.

This Old Man surnamed Zhao was exactly from the Green Devil Continent's three major Sects, the Restriction Demon Sect!

"The Void-Severing Restriction, I am not good at it, nor am I familiar with it, so I really didn't notice… However, since you mention it, I do recall one thing…" The Old Man surnamed Zhao's gaze flashed, and he spoke slowly.

"The tragedy at the Pill Sea, after investigation by my Restriction Demon Sect and combined with reports from secret agents, was locked onto an Elder of the Great Soul Gate named Wang Lin… And in the Pill Sea, a Void-Severing Restriction Compass went missing! But according to the Sect's central Formation, this Compass was not destroyed!" Elder Zhao said, looking up toward the depths of the Extreme Heaven Grassland.

"If this is really the case, it is very likely that he killed Elder Liu! Even if it wasn't him, he must be related to it!"

"Wang Lin…" A flash of murderous intent appeared in the eyes of the Old Man surnamed Zhang. He had to kill this person; otherwise, he would not be able to withstand the Sect Master's fury.