The cave was very long and winding. After going more than a thousand feet deep, Xiao Lingyu suddenly frowned. He stopped and reminded, "There should be a powerful monster ahead."
"I'll go take a look first."
As Ling 'er spoke, her body had already disappeared in a flash.
"Sister Ling 'er's ability is too powerful!" Miling praised sincerely.
At first, Miling didn't understand why Xiao Lingyu would bring Ling 'er, who was only at the Second Firmament of Longevity Stage, along. Now, he naturally understood. Even he felt that if they wanted to successfully complete this mission, they would have to rely on Ling' er.
However, Xiao Lingyu and Miling were uncertain and worried about whether Ling 'er could become invisible in front of a sea monster at the Nirvana Soul Stage.
Not long after, a powerful aura surged out from the depths of the cave, followed by the roar of a monster.
"Oh no, it's a Nirvana Realm monster!" Miling's expression changed drastically when he felt the powerful aura.
"Retreat!"
Xiao Lingyu made a prompt decision and retreated out of the cave at full speed.
As for Ling 'er, who was still in the depths of the cave, Xiao Lingyu and Miling didn't have to worry too much.
After exiting the cave, Xiao Lingyu immediately made a hand seal and chanted an incantation.
In just ten breaths, a monster with an extremely long body like a crocodile pounced out of the cave.
Ling 'er's body immediately appeared a thousand feet away from the entrance of the cave. The crocodile monster charged straight out. Its body was as black as a steel plate, and it shot towards Ling' er like an iron arrow.
However, Ling 'er disappeared in the next moment, causing the crocodile monster to miss.
Xiao Lingyu activated the Eight-Sided Nirvana Fire Sealing Formation at this moment. Rolling flames surged like a tide and instantly filled the entire island. However, all of its power was concentrated on the crocodile Demonic Beast.
Ling 'er quickly returned to Xiao Lingyu's side and quietly looked at the crocodile demon beast in the sea of fire.
The crocodile demon beast was indeed an existence at the Rebirth Realm, and the defensive strength of its scales wasn't weak at all. Even if it was incinerated by strands of Rebirth Flames, it didn't show any signs of being injured on the spot. Instead, it was constantly moving about madly within the formation while ceaselessly spitting out its own Rebirth Flames to attack in all directions.
It was obvious that it didn't have a deep understanding of Array Dao. Its attacks were chaotic and didn't have much impact on the eight-sided Nirvana Flame Sealing Array.
Under the siege of the Rebirth Flames, it was unable to find the path to return to the cave, nor was it able to charge out, and it gradually became irritable as it repeatedly emitted waves of furious roars.
However, its irritation and furious roars were of no use. It persisted for the time it took to brew a cup of tea before the hard scales on its body began to melt and dense black smoke began to rise from its body.
After another ten minutes, the crocodile demon beast's body was finally completely melted under the burning of various True Nirvana Flames.
The strange thing was that even though its body was gradually melting, it actually persisted until the end. Even though its body had completely disappeared, it was actually still alive. However, only a strangely shaped heart was left behind.
The heart's shape was strange, yet it seemed to be crystal clear. It was like a large shining gem.
"So it's at the Nirvana Heart Realm. Its Life Pearl is wrapped in its heart."
Miling's eyes flickered as he said, "The heart of a Nirvana Heart Realm Demonic Beast is an extremely good material for refining pills. Even if it's not used for refining pills, it's still very beneficial to directly consume it. It would be a pity to burn it and destroy it."
Xiao Lingyu didn't reply. Instead, he continued to maintain the formation's might and incinerate the demon beast's heart.
Only when the heart showed signs of melting did he stop the formation. Then, he walked over to the heart, formed a seal, and put it into a jade box.
"From the energy fluctuations of this heart, it should be of the moon attribute. A moon attribute Life Pearl of the Nirvana Heart Realm is ten times more valuable than a yang attribute one!" Miling said with a little excitement.
"There shouldn't be any other powerful sea beasts on the island. If there were, such a big movement would have alarmed them long ago."
Xiao Lingyu's expression was indifferent. After speaking, he led Miling and Ling 'er back into the cave.
For the sake of safety, Ling 'er hid himself and led the way in front. Xiao Lingyu and Miling followed behind slowly.
Indeed, they didn't encounter any more Demonic Beasts. Everyone walked for nearly ten thousand feet without any hindrance and arrived at the belly of the mountain.
The belly of the mountain was empty, and there were hard and cold stone walls on all sides.
To everyone's surprise, there were countless sparkling rocks on the stone wall. Waves of incomparably pure moon attribute energy were surging within the belly of the mountain.
"No wonder there is a moon attribute Nirvana Realm Demonic Beast here. It turns out there are so many Moon Crystals!" Miling said in amazement.
Moon Crystals were energy crystals like Yang Crystals. However, Yang Crystals were very common and easy to obtain in the World of Immortals. Moon Crystals were very rare, just like how yang attribute Demonic Beasts were very easy to find but moon attribute Demonic Beasts were very difficult to find.
A moon attribute Life Pearl could be exchanged for ten yang attribute Life Pearls of the same grade. Moreover, a cultivator had to be willing to exchange for it.
The value of a Moon Crystal was ten times that of a Yang Crystal.
"Moon Crystals are difficult to form. Why are there so many of them gathered together?" Miling was very suspicious.
"Why do you care so much? Let's hurry up and collect all these Moon Crystals!"
Xiao Lingyu was more straightforward. He didn't think too much and immediately flew into the belly of the mountain. Then, he used the Life-Affirming Dagger to pry out the Moon Crystals on one of the stone walls.
Miling and Ling 'er also followed closely behind and started to get busy.
The stone walls of the belly of the mountain were at least ten thousand feet high. They should extend deep into the ground. The Moon Crystals on the stone walls were densely packed and innumerable. Moreover, they had to be removed piece by piece. Of course, it was not something that could be done in a short period of time.
Unknowingly, the sky of the Lost Islands gradually darkened. The nine blazing suns hanging high in the sky were replaced by nine silver disc-shaped moons.
The strange thing was that as the Moon Crystals continued to disappear, the entire belly of the mountain should be getting darker and darker. However, when night came, it became brighter and brighter.
The deeper they looked into the belly of the mountain, the brighter it became.
Xiao Lingyu and the other two were somewhat puzzled. They temporarily stopped digging out the Moon Crystals and descended into the depths of the mountain.
"I feel that there is an incomparably pure Moon Attribute energy gathering in the belly of the mountain from all directions," Miling said as he descended.
When he was still a thousand feet away from the bottom of the mountain, Xiao Lingyu saw that on the ground at the bottom of the mountain where rocks were piled up, there was a strange pattern that was covered by the rocks. It was slowly flowing, and there was an obvious aura of a Spirit Array that was overflowing from it.
Xiao Lingyu didn't land on the ground. He only released his Divine Sense and moved the rocks away. Then, he saw a formation engraved on the ground.
After looking at it for a while, Xiao Lingyu said with narrowed eyes, "The reason why so many Moon Crystals can be gathered here is most likely related to this formation."
"This formation is definitely not formed naturally. It should have been set up by a powerhouse. It is probably used to create Moon Crystals," Miling said with a nod.
Xiao Lingyu muttered to himself for a while. Then, he began to study it. Miling and Ling 'er continued to dig out Moon Crystals from the stone walls.
It took nearly a month for all the Moon Crystals on the stone walls of the mountain to be dug out.
After a quick calculation, they realized that they had obtained nearly two hundred thousand Moon Crystals this time. This was undoubtedly a windfall for all of them, who weren't rich at all.
If they sold two hundred thousand Moon Crystals, it wouldn't be a problem to exchange them for two million Yang Crystals. If they were in urgent need of Moon Crystals and were rich, they could sell them for at least five hundred thousand Yang Crystals.
Miling was very happy. He couldn't hide the excitement on his face. Ling 'er, on the other hand, was still as indifferent as ever.
Xiao Lingyu was still studying the array diagram on the ground. Even though his cultivation in array dao was not bad, he could only barely remember the patterns of the array diagram and the way the patterns flowed. He could not grasp the gist of it and could not comprehend it.
"Actually, you don't need to study it thoroughly. You can just take away the formation and the stone slabs on the ground," Miling suggested.
"We can try."
Xiao Lingyu then did as he was told. However, to his and Miling's disappointment, just as he used the Life-Severing Dagger to pry up the ground, the formation that had been there for an unknown number of years and hadn't been taken care of by a cultivator for an unknown number of years suddenly collapsed into nothingness.
The Moon Attribute Energy that had gathered in the mountain seemed to have lost control. It crazily rushed out of the cave and overflowed from the small island.
If I don't, I'll be doomed.
Xiao Lingyu didn't care too much. He then left the mountain and the cave with Miling and Ling 'er. Then, he put away the Eight-faced Nirvana Flame Sealing Formation on the small island.
This was only the edge of the Lost Trace Islands. Under normal circumstances, they wouldn't encounter Nirvana Realm sea beasts. Therefore, after a short rest, the three of them continued to advance into the depths of the Lost Trace Islands.
Of course, as they advanced, they naturally had to use the Eight-faced Nirvana Flame Sealing Formation to obtain more Life Pearls from sea beasts.
Even if they couldn't complete the task given by the Lord Steward, at least this trip wasn't in vain. At most, they could return most of what they obtained to the Lord Steward.
However, since they had been entrusted with this task, it would be best if they could hunt a Nirvana Soul Stage Moon Attribute sea beast.
There were many Nirvana Realm sea beasts in the Lost Trace Islands. The last time they came, Uncle Tuo seemed to have deliberately avoided those powerful sea beasts. However, this time, Xiao Lingyu and the other two didn't know much about the Lost Trace Islands. Due to their lack of experience, they often encountered Nirvana Realm sea beasts.
However, those Nirvana Realm sea beasts were basically in the Nirvana Realm or the Nirvana Heart Realm. After falling into the Eight-faced Nirvana Flame Sealing Formation, they could only obediently hand over their Life Pearls.
In fact, the reason why those large clans and forces could be so powerful and their disciples could progress so quickly was because they could often go out to sea like Xiao Lingyu and the other two. They would either use a large number of experts or use special formations and methods to wantonly hunt sea beasts after going out to sea.
With enough Life Pearls from sea beasts, they would have enough Yang Crystals. Their disciples wouldn't lack the capital to cultivate and improve.
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