The mining efficiency was still quite fast.
Before long, a piece of dark marrow divine crystal the size of an egg was found.
This time, it was still reserved for the King-tier Dark Element Elf.
According to Ling'er's own estimation, even if the Dark Element Elf grew to Emperor-tier and fed most of its power back to the Dark Element Dimensional Sea, only receiving a small portion of the feedback power itself, it would not break through to King-tier.
Zheng Dong was also helpless. Others were finding ways to speed up their pets' growth, while he was trying to suppress his pets.
There was no choice, as Ling'er and Youyou were both General-tier.
Moreover, it would still take some time for him to break through his pet beast space to level 5 and become a Master-tier Beast Tamer.
In the following days, Zheng Dong became addicted to mining.
The dark marrow divine crystals obtained were comparable in value to a legendary resource.
Fortunately, hard work paid off. After absorbing these dark marrow divine crystals, the King-tier Dark Element Elf also grew to Emperor-tier, and its demonic bloodline changed from pure blood to true blood.
After all, these dark marrow divine crystals were formed from the bone marrow of lower-god demons.
With this, the Dark Element Elf could completely suppress the One-Eyed Demon, preventing it from even thinking of resisting.
As this Dark Element Elf grew, the Dark Element Dimensional Sea also expanded further, becoming hundreds of times larger than initially.
Ling'er could now condense more Dark Element Elves.
This time, it condensed a hundred Dark Element Elves.
It was worth mentioning that the ten Dark Element Elves condensed earlier had also rapidly grown to General-tier with the help of the Emperor-tier Dark Element Elf.
This speed was simply faster than a rocket.
There was no other reason than they not only had the Emperor-tier Dark Element Elf helping them but also could use dark marrow divine crystals.
Furthermore, as the Dark Element Dimensional Sea expanded, their cultivation speed was faster than in the outside world.
The power of the Dark Element Dimensional Sea was gradually showing its might.
Perhaps in no time, the Dark Element Elves condensed would be able to become General-tier in the blink of an eye after entering the Dark Element Dimensional Sea.
At that time, Ling'er would be equivalent to an army of pets.
Seeing Zheng Dong's strength increase significantly, the One-Eyed Demon knew it had no hope of escaping.
However, it still did not want to die and quickly warned:
"Stop digging, if you dig any further, you'll reach the Demoness's main mine. The guard of the main mine is the Thousand-Handed Demon, who is the Demoness's absolute confidant."
Zheng Dong did not panic and calmly asked:
"What level is the Thousand-Handed Demon?"
"Emperor-tier! Besides it, there should be five King-tier demons, and some General-tier demons.
And there are also a large number of Lord-tier demons mining here," the One-Eyed Demon said.
This lineup was indeed quite powerful, and Zheng Dong could not afford to provoke it at the moment.
However, he did not plan to stop.
He simply asked Little Purple to avoid the main mine shaft as much as possible when searching for dark marrow divine crystals.
After all, Mount Demon was vast, and there was no need to clash head-on with them.
Zheng Dong planned to upgrade the ten General-tier Dark Element Elves to King-tier, and the remaining Dark Element Elves to General-tier, before heading to the main mine shaft.
As for the Emperor-tier Dark Element Elf, he did not dare to upgrade it further.
If it were upgraded to Overlord-tier, Ling'er might not be able to suppress its own growth level.
After mining for a few more days, not only did Zheng Dong achieve his goal, but even the Emperor-tier Dark Element Elf had improved significantly, only half a step away from Overlord-tier.
With this, Zheng Dong prepared to go to the main mine shaft to take a look.
At this time, the One-Eyed Demon had also recovered some of its abilities, but it was still King-tier, not Emperor-tier.
It could now only act as a guide. After all, if it were discovered by the Demoness, it would surely die. It could only pray that Zheng Dong would not kill it.
Therefore, after the Hellish Minotaur dug open the main mine shaft, the One-Eyed Demon showed no mercy to the other demons who were digging.
As the Lord-tier demons who were digging fell one by one, the Thousand-Handed Demon was alerted.
The Thousand-Handed Demon, along with five King-tier demons and dozens of General-tier demons, came to attack.
Upon seeing the One-Eyed Demon, it was also surprised.
It immediately realized that the One-Eyed Demon had betrayed the Demoness and intended to deal with the One-Eyed Demon personally.
It condensed countless demonic hands and grabbed at the One-Eyed Demon.
The heavily injured One-Eyed Demon was no match for the Thousand-Handed Demon, and it could only beg Zheng Dong for help.
Although Zheng Dong had promised not to kill it, he had not promised to save it.
Taking advantage of the Thousand-Handed Demon dealing with the One-Eyed Demon, Zheng Dong instructed the Emperor-tier Dark Element Elf to attack the Thousand-Handed Demon.
The Dark Element Elf did not hesitate and struck ruthlessly, heavily wounding the Thousand-Handed Demon.
However, the One-Eyed Demon was also killed by the Thousand-Handed Demon.
From then on, it was a one-sided affair.
The Emperor-tier Dark Element Elf quickly dealt with the Thousand-Handed Demon, and together with the other Dark Element Elves, cleaned up the remaining King-tier and General-tier demons.
Only a large number of Lord-tier demons were left to continue mining.
Facing the Emperor-tier Dark Element Elf, these Lord-tier demons had no intention of resisting and could only mine silently.
Under Little Purple's command, the mining efficiency was twice as fast as before.
Zheng Dong thus obtained a large number of dark marrow divine crystals.
To avoid suspicion.
Zheng Dong taught Ling'er the high-tier skill Imprint: Mimicry Camouflage.
Once Ling'er learned Mimicry Camouflage, all the Dark Element Elves it condensed would naturally master it.
At the same time, Ling'er would also master all the dark-element skills that these Dark Element Elves independently learned.
This special symbiotic relationship was even closer than that between a clone and its main body.
Subsequently, the Emperor-tier Dark Element Elf used Mimicry Camouflage to disguise itself as the Thousand-Handed Demon and even absorbed and refined the demonic stone, the life crystal left behind by the Thousand-Handed Demon.
As a result, it also mastered several dark-element skills that the Thousand-Handed Demon possessed.
With this, even if the Demoness herself came, it would be difficult to recognize the Dark Element Elf disguised as the Thousand-Handed Demon.
Thus, Zheng Dong was not in a hurry and continued to mine on Mount Demon.
Even if these dark marrow divine crystals could not be used up now, they could be used in the future.
Under Little Purple's command, a large number of dark marrow divine crystals were excavated.
Zheng Dong stored them in his pet beast space.
Zheng Dong's pet beast space was now quite large and stable, containing numerous resources, as well as plenty of food and daily necessities.
This was also the reason why Zheng Dong could stay here without worrying about starving.
He just didn't know how Xia Mengqiu and the others were doing.
Stockpiling a large amount of food was a reminder from Xia Mengqiu.
As the Lord-tier demons continued to mine, one day they dug up a dark marrow divine crystal the size of a soccer ball.
Moreover, at the end of the main ore vein, a strange cave appeared.
Zheng Dong took Little Purple and other pets to investigate.
He found that the cave was not very large, and the stone walls and the ceiling were covered with strange patterns.
What surprised Zheng Dong even more was.
Cultivating in the cave was thirty times faster than in the outside world, and it could also strengthen mental power.
Could this be the head of a lower-god demon?
Zheng Dong decided to stay here to cultivate.
He also instructed Little Purple and other pets to cultivate their mental power here.
Although Little Purple was cultivating with Zheng Dong, it had also condensed many clones. These clones could command the Lord-tier demons to continue mining, increasing mining efficiency.
Afterward, he had the Dark Element Elves block the cave and commanded the Lord-tier demons to continue mining.
The main mine shaft had already been dug through, and they could only continue digging outwards from the main mine shaft.
Fortunately, everything went smoothly, and they were not discovered by the Demoness.
This was because the Demoness sent people to collect the mined dark marrow divine crystals every seven days.
The Dark Element Elves also submitted them on time.
However, they only submitted the amount that the Thousand-Handed Demon had submitted before.
A large portion remained, which was all thanks to Little Purple's improved mining efficiency.
In the blink of an eye, more than two weeks passed. Zheng Dong's mental power increased to advanced, and the power of skills like Telekinesis Control became nearly ten times stronger than before.
In addition, Zheng Dong felt that it was easier for him to break through to Master-tier Beast Tamer than before.
It seemed that the improvement in mental power had smoothed the threshold for advancing from Advanced Beast Tamer to Master-tier Beast Tamer.
Therefore, he was not in a hurry to leave and continued to cultivate.
After all, as long as the Demoness did not discover this place, it was the safest place.
Moreover, the cultivation speed here, thirty times that of the outside world, was simply the best cultivation holy land.
The only pity was that Zheng Dong did not have much Ethereal Stone left.
Otherwise, it would be even easier to upgrade the pet beast space to level 5.
After another forty-five days, Zheng Dong had effectively cultivated for more than three years in the outside world. His pet beast space successfully upgraded to level 5, and he became a Master-tier Beast Tamer, only then did he stop cultivating.
He then discovered that the surroundings of the cave were already covered with cracks and could collapse at any moment.
It seemed that all the foundation here had been exhausted by Zheng Dong.
Zheng Dong also felt that the subsequent cultivation speed was also continuously slowing down.
For this reason, he also left the cave and came to the main mine shaft.
It was time to leave.
However, before leaving, he wanted to try if he could help the Emperor-tier Dark Element Elf grow into an Overlord-tier.
Because with his current physical condition, he was capable of contracting a King-tier pet beast beyond his level.
This meant that Ling'er would no longer need to suppress its growth level.
Thus, the Emperor-tier Dark Element Elf returned to the dimensional sea and began to refine the dark marrow divine crystals dug up during this period.
As these dark marrow divine crystals disappeared one by one, the growth level of the Dark Element Elf soared.
This was equivalent to sucking the marrow from the bones of a lower-god demon that had been dead for many years.
The Dark Element Elf absorbed for three days and three nights, and more than half of the dark marrow divine crystals were absorbed. Finally, with a roar, it broke through, and its growth level reached Overlord-tier.
Concurrently, with its feedback, the Dark Element Dimensional Sea continuously expanded, becoming nearly a thousand times larger than initially.
Ling'er also grew into a King-tier pet beast as a result.
This way, Ling'er's absorption of the Azure Dragon bloodline power within Zheng Dong's body became even stronger.
Affected by this, the Azure Dragon formed by the Dragon Element Elf also grew to General-tier, and the Dragon Element Dimensional Sea became more stable and continuously expanded.
Afterward, Ling'er condensed another thousand Dark Element Elves and had them cultivate in the Dark Element Dimensional Sea.
However, apart from one Overlord-tier Dark Element Elf, the remaining ten King-tier Dark Element Elves had not yet grown to Emperor-tier.
And the hundred Dark Element Elves condensed earlier had only grown to General-tier.
Zheng Dong decided to continue mining, to excavate more dark marrow divine crystals in the shortest possible time, to help the ten King-tier Dark Element Elves all grow to Emperor-tier, and the hundred General-tier Dark Element Elves to grow to King-tier.
For this purpose, Zheng Dong had Little Purple condense numerous clones to improve mining efficiency, and had the Overlord-tier Dark Element Elf also participate in mining.
This way, the mining speed would be even faster.
Moreover, with the Overlord-tier Dark Element Elf present, Zheng Dong felt more confident.
Even if the Demoness came, he could escape.
In addition, as Zheng Dong became a Master-tier Beast Tamer, the number of pet beasts he could contract increased to five, and his skill domain could be layered five times, further increasing his cultivation speed.
And he could combine any four skills to form a profound meaning.
The number of imprinted skills also changed again; there were no restrictions on low-tier, mid-tier, high-tier, and super-tier skills.
The number of imprinted divine-tier skills increased to five.
Meanwhile, in the outside world, quite a few changes had occurred.
The Demoness and the Saintess had fought three times, but neither had won in the end.
However, the demons had suffered losses.
This was because many human Beast Tamers had helped the angels in the battle, including several legendary Beast Tamers.
Yet, they still failed to break through the demon's defenses, causing both sides to return to their initial standoff.
For this reason, the Demoness also had no time to pay attention to the changes in Mount Demon, and only ordered the demons to urge the Thousand-Handed Demon to speed up mining.
She planned to use the dark marrow divine crystals to break through to Totem-tier, but she was still short of the accumulated dark marrow divine crystals.
Unfortunately, after a few days, the Demoness did not receive the dark marrow divine crystals, only heard a loud bang, and Mount Demon collapsed.
Under the violent mining of the Overlord-tier Dark Element Elf, most of the dark marrow divine crystals in Mount Demon were excavated.
For this reason, Mount Demon collapsed.
Fortunately, Zheng Dong got his wish.
The excavated dark marrow divine crystals not only allowed the ten Dark Element Elves to grow to Emperor-tier but also allowed the hundred Dark Element Elves to grow to King-tier.
The remaining thousand Dark Element Elves also rapidly grew to General-tier.
Ling'er's strength was now undoubtedly the strongest in the team.
Youyou felt that she needed to obtain an Overlord-tier undead puppet to have a chance to compete with Ling'er.
As for Little Purple, it was still Lord-tier and only wanted to break through to General-tier as soon as possible.
Xiao Qing, who was Commander-tier, had completely given up and had no intention of competing with them.
Jingjing, who was Commander-tier, was still unaware of all this. She was still outside trying to obtain information about forbidden bombs.
Mount Demon had collapsed, and Zheng Dong did not want to confront the Demoness directly. He quickly returned to the One-Eyed Demon's palace along the passage.
In the One-Eyed Demon's palace, two outsiders had also arrived: Lei Tianqi and Ye Xue'er.
Lei Tianqi and Ye Xue'er had similar luck to Zheng Dong, both being teleported to the outer city area of the Divine City.
During this period, they had also been constantly attacked and killed by demons.
They had always wanted to break through the demon's defenses and enter the inner city.
Unfortunately, they had not succeeded.
Finally, they found a palace that was not occupied by demons and was relatively intact, so the two could not help but stay to rest.
Upon seeing the two, Zheng Dong's clone did not reveal itself and quietly hid with Meng Na.
Lei Tianqi and Ye Xue'er took out food, and after eating their fill, they prepared to search for any usable resources.
The two searched carefully for a long time but found nothing.
Just then, one of their pets discovered Zheng Dong's clone and Meng Na.
This made Lei Tianqi and Ye Xue'er excited.
It was like a hunter discovering prey.
"Zheng Dong, you're here too! Why are you hiding? Why don't you come out and say hello?" Ye Xue'er said with a smile.
"That's right, after all, you're a genius from the Special Operations Bureau. Why are you as timid as a mouse?" Lei Tianqi also mocked.