In the blink of an eye, the energy within the low-grade Nether Stone was completely absorbed, turning it into a greyish-white ordinary stone. It was covered with cracks, as though it would shatter with a slight touch.
The energy contained within the low-grade Nether Stone was undoubtedly very minute to Chu Mu. It was completely negligible. However, when Chu Mu carefully sensed it, he discovered that the All-heaven Nether Sword had been replenished by a subtle energy.
"It's effective." Chu Mu was immediately overjoyed.
The Nether Stones he had obtained were low-grade and mid-grade Nether Stones. After killing the Seven Sons of the Heaven Nether Sect, he had obtained many Nether Stones in their interspatial rings. In total, he had over thirty-five thousand low-grade Nether Stones, twelve thousand mid-grade Nether Stones, six hundred high-grade Nether Stones and seventy-three supreme grade Nether Stones.
It could be said that Chu Mu's wealth of Nether Stones was undoubtedly at the forefront among the people of the Nether Realm. Even some Sovereign Realm experts couldn't compare to him.
With so many Nether Stones, he wondered if the All-heaven Nether Sword's grade could be increased.
He took out more Nether Stones and rapidly absorbed them. Naturally, he started with the low-grade Nether Stones.
The consumption of the low-grade Nether Stones was astonishing. In just a short while, the energy within thousands of low-grade Nether Stones was completely absorbed. However, the All-heaven Nether Sword's power only increased by a little.
While letting Little Tian control the absorption of the low-grade Nether Stones, Chu Mu locked onto the grey aura within his body. It was the Tracking Seal of the Heaven Nether Sect. Previously, he couldn't expel it and could only temporarily seal it. However, the seal couldn't last for too long. Now, the seal was on the verge of collapse.
"I wonder if the new Truth Seeking Technique can deal with it?" Chu Mu thought. He immediately circulated the Truth Seeking Technique. Under the rotation of the Great True Wheel, a terrifying energy crushed over. The effect was unexpectedly good. The grey Nether Seal was instantly crushed and turned into pure Nether Qi that was absorbed by the All-heaven Nether Sword.
Chu Mu felt that the pure Nether Qi of the Nether Seal was more than ten times more than the energy contained in thousands of low-grade Nether Stones. It instantly increased the power of the All-heaven Nether Sword by a lot. It was closer to the mid-grade Great Emperor Realm.
"The Tracking Seal disappeared?" Ancestor Hei Ming, who was still chasing after Chu Mu, felt his heart tremble. Although his aura was isolated, he was sure that the Dark Tracking Seal was still there. Now, it had completely disappeared.
"He actually has the ability to expel the Dark Tracking Seal?" Patriarch Black Nether was extremely surprised.
The Dark Tracking Seal was something Sect Master Tian Ming had created. Ordinary Little Dominator Realm experts wouldn't be able to expel it unless they were Little Dominator Realm experts who cultivated Underworld Energy.
Ancestor Heiming was even more curious about Chu Mu, and he was even more determined to capture him alive. He had a premonition that if he could capture him alive and interrogate him about his Cultivation Method, it would be a qualitative leap for him.
However, Chu Mu's speed wasn't much slower than his. Adding on the fact that he had lost the guidance of the Tracking Dark Imprint, it would be even harder for the Black Underworld Ancestor to find him. He could only rely on his luck. After all, when Chu Mu passed by, he would either disperse his aura or set up a trap to spread his aura in all directions to confuse the Black Underworld Ancestor.
Chu Mu's luck was very good. He avoided some Little Dominator Realm underworld beasts and Underworld Corpse Warriors and successfully returned to the low-grade zone.
The moment he entered the low-grade zone, Chu Mu heaved a sigh of relief. At the same time, the All-heaven Nether Sword had also leveled up. It had leveled up from the low-grade Great Emperor Realm to the mid-grade Great Emperor Realm. However, Chu Mu had used up all his low-grade Nether Stones.
If he hadn't absorbed the pure energy of the Dark Tracking Seal, he would have had to use at least a few hundred mid-grade Nether Stones to level up.
"I wonder if the remaining Nether Stones can level up the All-heaven Nether Sword to the limit of the Great Emperor Realm?" Chu Mu thought to himself as he continued to absorb the energy.
In addition, Chu Mu didn't give up looking for the Nether Stones.
"Oh right, I wonder if the Nether Beast Crystal can also be used to level up the All-heaven Nether Sword?" Chu Mu had another thought in his mind.
Thinking of this, Chu Mu began to try. He first took out a piece of Nether Beast Crystal and let Little Tian absorb it.
The power of the Nether Beast Crystal was completely different from the power of the Nether Stones. However, after trying, Chu Mu discovered that the All-heaven Nether Sword could absorb it. Perhaps it was because the Truth Seeking Technique had been improved.
"Great, in this way, the All-heaven Nether Sword can definitely be leveled up to the high-grade Great Emperor Realm, or even the limit." Chu Mu was secretly delighted.
While letting Little Tian absorb the power of the Nether Beast Crystal and the Nether Stones, Chu Mu was also looking for underworld beasts to kill.
He was so powerful that he was invincible in the low-grade zone. Even if he was surrounded by a group of underworld beasts, he could still advance and retreat freely.
The Sword Light pierced through the air and instantly killed a group of Nether Fire Wolves that surrounded him. This made a few people not far away widen their eyes in horror.
"What a terrifying strength."
"That's a Sovereign Realm expert, right?"
"It should be. Otherwise, it's impossible for him to be so powerful."
While a few people were discussing in shock, Chu Mu had already dug out all the Nether Beast Crystals of the Nether Fire Wolves. There were more than thirty of them. His figure flashed and disappeared.
Hunting, absorbing, repeating this process, the All-heaven Nether Sword also broke through as it wished and reached the high-grade Great Emperor Realm. However, it was still some distance away from the limit.
Because the Truth Seeking Technique had integrated the essence of the Nether Sect's cultivation technique, it allowed Chu Mu to have a clearer and more subtle sense of the fluctuation of Nether Qi. Therefore, he could better sense the Nether Beasts and Nether Corpse Martial Artists in the distance and find targets to kill. While hunting, Chu Mu headed towards the exit of the Nether Realm.
There were two reasons why he wanted to leave the Nether Realm.
The first reason was that Chu Mu's purpose of coming here was to gain experience and sharpen himself with the dangers of the Nether Realm. The current danger was enough. After all, he had a life-and-death battle with a Sovereign Realm expert who had grasped the source of the Nether Realm. It was very important for him to know the limit of his strength.
In the end, one of the reasons why Chu Mu came out to gain experience was to know the limit of his strength. Now, not only did he know it, but he had also improved the Truth Seeking Technique and condensed the All-heaven Nether Sword. It was an unexpected gain that made the result of this experience even better.
In addition, the All-heaven Nether Sword could also be upgraded to the limit of the Great Emperor Realm by using the Nether Stones and Nether Beast Crystals.
The second reason was that the Sovereign Realm expert of the Heavenly Nether Sect was still chasing after him. With his current strength, even if he used the True Secret of Human Dao, he wouldn't be able to defeat the Sovereign Realm expert, let alone kill him. The True Secret of Human Dao was a secret technique that couldn't be maintained for too long.
Towards the end, it was difficult to find any Nether Beasts to hunt or Nether Stone Mines. Chu Mu was rushing with all his heart while Old Ancestor Hei Ming was chasing after him wholeheartedly. He could only rely on his intuition and judgement. He didn't expect that the Old Ancestor would still be able to catch up to him. He was closing in on Chu Mu bit by bit. However, the distance between them was very far. Old Ancestor Hei Ming wouldn't be able to catch up to Chu Mu in a short period of time.
After a period of time, Chu Mu arrived at the exit and rushed into it without looking back.
"Stop right there!" Old Ancestor Hei Ming shouted. However, even with his fastest speed, there was still a distance of more than a hundred thousand meters between him and the Old Ancestor Hei Ming. This distance was covered in a breath's time under his speed. However, it was also covered in a breath's time under the Old Ancestor Hei Ming's speed.
After rushing into the exit, Chu Mu left the Nether Realm without stopping. He took out the Unparalleled Flying Ship and entered it. He raised its speed to the maximum and left in an instant.
The Unparalleled Flying Ship's speed was at the Sovereign Realm. It wasn't slower than Old Ancestor Hei Ming and might even be slightly faster. There was also a slight time difference between the two. Old Ancestor Hei Ming could only watch as the Unparalleled Flying Ship left.
A terrifying aura spread out from Old Ancestor Hei Ming's body and swept in all directions. The astonishing pressure made everyone present unable to breathe. It was as if they were being suppressed by an invisible mountain. They were terrified and felt as if they were about to die.
Old Ancestor Hei Ming's anger made him want to kill everyone present. However, his last trace of rationality prevented him from doing so because this was outside the Nether Realm.
He could do whatever he wanted in the Nether Realm. However, he couldn't do so outside the Nether Realm. If he killed people here, it wouldn't take long for a terrifying expert to kill his way into the Nether Realm. At that time, even the Sect Master of Heavenly Nether Sect wouldn't be able to protect him.
In fact, a long time ago, the Sect Master of Heavenly Nether Sect didn't only have three ancestors. However, one of them had killed people at the entrance of the Nether Realm. Not long after he returned to the Sect, a Sovereign Realm expert came to kill him. Even the Sect Master of Heavenly Nether Sect couldn't resist him. As a result, that ancestor was killed and the Sect Master of Heavenly Nether Sect became three ancestors.
Such a lesson prevented the Sect Master of Heavenly Nether Sect from killing people at the entrance of the Nether Realm unless he wanted to die.
Old Ancestor Hei Ming had no choice but to return to the Nether Realm in anger. On the way back to the Sect Master of Heavenly Nether Sect, the underworld beasts, corpses, and cultivators he encountered all died tragically at his hands.
"That person just now, isn't that His Excellency?" Among the crowd at the entrance, four people looked surprised.
"Yes, that's him."
"That person just now was one of the three ancestors of Heavenly Nether Sect. A Sovereign Realm expert was chasing after him."
"It should be."
"He was actually able to escape from the pursuit of a Lesser Sovereign Realm expert."
These four people were the ones who had joined forces with Chu Mu to mine the Nether Stone mine. They still remembered Chu Mu. Now that they saw this situation, the shock in their hearts couldn't be described with words.
"Strange, Yin Mingzi was killed. The Seven Sons of Heavenly Nether Sect should be the ones chasing after him. Why would they send out the three ancestors?"
"Could it be that the Seven Sons of Heavenly Nether Sect failed?"
This possibility was very high. However, they didn't know that not only did the Seven Sons of Heavenly Nether Sect fail, they even lost their lives.
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