Chapter 725 Dark Vein Abyss

In the south of Lingzhou, there is a deep valley.

Five streaks of light swept across the northern mountain range and landed at the mouth of the valley.

The demonic energy in the valley was even denser than it had been three days ago. Dark purple mist surged up from the valley floor, carrying a corrosive aura. Two Nascent Soul cultivators from the Tianyue Sect stood guard at the valley entrance, their faces grim.

"The demonic energy is seeping out too quickly."

The Nascent Soul cultivator on the left said, "Three more cracks have appeared in the second layer of the seal. We've patched two, but there's still one that can't be patched, and the spiritual runes' foundation is shattered."

Li Yuan nodded, said nothing more, and sank straight to the bottom of the valley.

The passive perception spread out over a distance of 1,800 zhang.

The operational status of the Six-Point Resonance Sealing Array was reflected in his mind. The permanent aura of the Abyss Resonance transmitted the load of the six array eye spirit stones one by one. The six spatial folding chains were extremely taut, and the pressure was approaching 70% of their limit. When he left three days ago, it was only slightly over 50%, but in just a few days it had increased by nearly 20%.

The crack walls are also thinning. A comparison with records from three days ago shows another 10% reduction. At this rate, the previously estimated two-month duration will have to be shortened further.

On the other side of the rift, two distinct fluctuations of demonic energy at the Nascent Soul level were clearly visible. Both the heavy and the violent energy were present, their fluctuations even denser than before, as if alternatingly impacting the edge of the rift, testing the strength of the seal.

Li Yuan stored the latest information in his mind and continued to descend along the valley wall without stopping.

Two hundred feet deep, the passage that was previously excavated was still there. The inner walls bore traces of spatial cutting techniques, and the rock surface was smooth. Li Yuan entered sideways and explored his way down to the main trunk of the dark vein.

The first two sections of the segmented, nested purification array are still in operation. The Spirit-Transforming Demon Orb hangs in the center of the second section's cutoff area. Dark red demonic energy is absorbed into the orb and then transformed into spiritual energy from the other end, flowing into the earth's veins.

After the fourth-order array was perfected, there was no need to check the details of the closed loop one by one. The first section was stable, and in the second section, the spiritual power of the sealing seal was slightly reduced in one place, but it was still within the acceptable range.

Li Yuan continued to push downstream.

Fifty zhang, one hundred zhang, one hundred and fifty zhang.

The concentration of demonic energy continued to rise. Below two hundred feet, the dark purple mist was so thick that it was visible to the naked eye, flowing slowly through the passage like an inverted river.

Dark Vein Abyss Zone.

The ancient demonic runes on the wall were almost completely intact. The spiral compression structure unfolded layer by layer from the depths of the rock wall, and the method of using demons to subdue demons was extremely ingenious, consistent with what was seen in the sea of ​​consciousness when the Netherworld Demonic Essence was permanently established.

Li Yuan slowed down, scanning the dark vein structure layer by layer with his perfect understanding of the fourth-order array.

The purification array was still operating, and the fluctuations in space caused a fist-sized rock wall to peel away, revealing a crystal inside.

The crystal is dark gray all over, with extremely fine dark purple lines on the surface, like natural marks left by demonic energy over many years.

Within a three-foot perception range, the green text fluctuated.

Previously, this crystal was hidden in the wall, and Li Yuan did not notice the inscription. Perhaps it was because it absorbed demonic energy and underwent a change that the inscription appeared.

Li Yuan picked up the crystal, and the complete panel appeared.

[Equipable item detected: Magic Breath Crystal]

[Equipment Attribute Preview: Magic Breath Regeneration - Green]

[Effect: Increases spirit energy recovery speed by 30% in demonic environments; increases spell duration by 20% in mixed spirit and demonic states.]

[Preview of Permanentization Conditions: Maintain the operation of three or more formations continuously for seven days in an environment rich in demonic energy]

The bonuses to spiritual energy recovery and spell duration are perfect for the Deep Abyss Valley. The conditions for permanent activation aren't difficult either, as the segmented purification array already has multiple arrays continuously operating.

Li Yuan put the magic crystal into his storage bag, but did not equip it for the time being.

After carefully storing the crystal, Li Yuan continued deeper into the dark vein.

Three hundred feet, three hundred and fifty feet, four hundred feet.

The concentration of demonic energy continued to rise, reaching a depth of four hundred feet, exceeding that of the upper dark veins by several times. The dark purple mist was no longer just a thin fog, but a thick, almost liquid mist that flowed slowly along the wall.

The ancient demonic runes are remarkably well-preserved here, with the spiral compression structure on the wall layered upon layer. The permanent inscription of Netherworld Demonic Essence makes every curve and direction clearly discernible.

Suddenly, a section of the rock strata in front collapsed.

It wasn't a recent collapse; the rock face had been weathered for at least several hundred years. The collapse revealed the ruins of a stone chamber, its walls covered with demonic runes, mostly broken, with only the portion near the ground remaining.

Ancient Demonic Path Sealing Chamber.

Li Yuan entered the ruins. The stone chamber was small, about five zhang in diameter. In the center of the ground was a groove, the shape of which was similar to the core of a six-point resonance sealing array, suggesting it was the core of some kind of sealing array. The groove was empty; the array had long since ceased to function.

The east wall is relatively intact. Deep within the rock face is a dark red spirit stone, about the size of an egg, with a dull luster on its surface.

Within a three-foot perception range, the green text fluctuated.

Li Yuan approached and took the dark red spirit stone out of the rock wall.

[Equipable item detected: Abyss Magic Stone]

[Equipment Attribute Preview: Abyss Demonic Essence - Green]

[Effect: Automatically filters impurities from demonic energy during cultivation, increasing cultivation speed by 50%.]

[Preview of conditions for permanentization: Cultivate for a cumulative total of thirty days in an environment where the concentration of demonic energy exceeds five times the normal level]

This Abyss Demon Stone is very useful for the ancient demonic body-refining techniques. Although the demonic energy in the Abyss is dense, it also contains many impurities. Filtering it will save a lot of effort in tempering the bone marrow.

The concentration of demonic energy here is five times higher than normal, which perfectly meets the conditions for permanent formation.

Li Yuan put the Abyss Magic Stone into his equipment slot.

The dark red spirit stone disappeared in his palm.

The demonic energy pathways within the body immediately gained an additional layer of enhancement. With a turn of the Dark Abyss Demonic Essence Technique, a wisp of demonic energy surged from the meridians, flowing through the pathways even purer than before, with impurities automatically stripped away.

The Abyss Demonic Infusion has taken effect, and the permanent effect countdown has begun.

Li Yuan sat cross-legged in the ruins of the sealed chamber and began cultivating the second stage of the ancient demonic body-refining secret technique, condensing his bone marrow.

The Dark Abyss Demonic Essence Technique was fully activated, and demonic energy surged from the meridians, passing through the bone trabeculae opened by the light veins, and entering the bone marrow cavity.

The first stage of expelling impurities has been completed. Now, the demonic energy has seeped into the bones, no longer driving away impurities, but directly compressing the bone marrow.

The demonic energy repeatedly crushed through the bone marrow. With each round of compression, the bone marrow density increased slightly, and the output of spiritual energy increased accordingly.

With the Dark Marrow Tempering Blue attribute, the Tempering Bone Essence Permanent effect, and the Abyss Demon Essence stacked together, the condensation speed was more than twice as fast as on the ground.

Li Yuan first advanced along the spine and rib cage. These two bones are located in the core of the torso, where the bone marrow cavity walls are the thickest and can hold the most demonic energy.

Demonic energy surged into the spinal cord cavity, compressing along each vertebra. The network of light veins, perfected by the advanced Spiritual Light Tempering Technique, covered the outside, rapidly repairing any minor damage caused by each round of condensation with light-attribute spiritual energy. The repaired cavity walls were denser, making the next round of condensation smoother.

The light-magic interwoven layer continues to expand within the spinal cord.

The ribcage and spinal cord are advanced synchronously. The ribs are flat, and the medullary cavity is narrower than that of the long bones, so the lift per cycle is not significant. However, there are many ribs, so the total lift is considerable.

An hour later, Li Yuan finished his practice.

Upon internal inspection of the spine and rib cage, the bone marrow density in both areas was significantly increased, and the spiritual energy output of the spinal bone marrow was nearly 20% higher than before.

The Dark Vein Abyss Zone, combined with the Abyss Demonic Essence, is perfect for advancing the Ancient Demonic Path Body Refinement Secret Technique.

Li Yuan got up, left the ruins of the sealing chamber, and returned to the surface along the dark vein passage.

Deep abyss, deep valley mouth.

Zhou Heng and two Nascent Soul cultivators from the Tianyue Sect are still there.

Li Yuan briefly explained the results of his exploration of the Dark Vein Abyss region. He clearly explained the routes of the three branch paths, their correspondence with the nodes of the Seven Star Demon Gathering Array, and the preservation status of the ancient demonic runes in the abyss region.

After noting it down, Zhou Heng said, "We've already seen the effects of the Dark Vein Severance. The demonic energy around the crack is indeed decreasing, albeit slowly, but in the right direction. Continue advancing."

"In addition," Zhou Heng lowered his voice.

"The Nascent Soul cultivators from the upper realm who will provide support have been selected and are expected to arrive within seven days."

Li Yuan nodded, asked no further questions, and turned back to the depths of the Dark Vein.

For the next few days, Li Yuan traveled back and forth between the Dark Vein Abyss Zone and the Deep Valley of the Netherworld.

During the day, he maintains the seal at the bottom of the valley and patrols the segmented purification array. At night, he descends to the ruins of the ancient demonic sealing chamber in the abyss area to cultivate the ancient demonic body-refining secret techniques.

The Spirit Transformation Magic Orb continues to operate, and the purification progress steadily increases. Multiple segmented purification arrays continue to operate in the environment rich in demonic energy, and the conditions for permanentizing the green attribute of Demonic Breath Transformation are also accumulating simultaneously.

With the triple blessing of Abyss Demonic Energy, Dark Marrow Bone Tempering, and Bone Tempering Essence pressing down on him, coupled with the almost liquid demonic energy of the Abyss region, the density of his spinal and rib bone marrow increased day by day.

The intertwined layers of light and magic spread from the spine and ribs to the limbs. Light-attribute spiritual power and demonic energy intertwined repeatedly at the junction of the bone marrow cavity walls, and the mixed layer became increasingly dense.

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