“If we cooperate with each other and use group defense skills, we should be able to keep the overall consumption to around 10% each time. Moving through the cave shouldn’t be a problem. However, deep within the cave, I discovered a downward crack, bottomless. The wailing sound comes from there. None of us know what’s inside, but I can feel a fierce spiritual power fluctuation within. There’s likely a demonic beast or some unknown threat. You’ve all seen my self-preservation ability, so I plan to go deeper and explore alone. This time, I’ll use a scouting gem to record everything.”

“Shall I go with you?” Caier asked Long Haochen.

Long Haochen shook his head and said, “It’s better if I go alone. With Haoyue here, I can teleport out at any time.”

Caier nodded silently. Indeed, with Long Haochen’s current strength, as long as he’s not instantly killed by a sudden enemy, his safety shouldn’t be a concern.

But how easy is it to instantly kill him? Don’t forget, he has a Soul Chain, sharing life with his other six companions. Even an eighth-tier powerhouse might not be able to kill him in one hit.

Since even Caier agreed, the others naturally had no reason to disagree. Long Haochen stated that he would record the entire process with the scouting gem, proving to everyone that he had no ulterior motives. Even if something good was found, it would be recorded by the scouting gem. It has to be said that the Blood Contract’s mutual teleportation ability is perfect for this kind of exploration mission. This is also why Long Haochen, despite knowing the mission was difficult, still decided to accept it.

After a short rest, Long Haochen entered the Fearful Howling Cave for the second time.

Having the experience of the previous exploration, he easily returned to the deep cave crack. However, he didn’t rush to continue, but stopped at the place where he had been sitting before.

When the wailing sound rang for the fourth time, a hint of satisfied smile appeared on Long Haochen’s face. When his Holy Light Barrier opened again, a strange scene appeared.

On the surface, Long Haochen’s Holy Light Barrier hadn’t changed, but if you looked closely, you could see a hazy feeling in the originally light golden Holy Light Barrier.

Vibration, yes, the Holy Light Barrier was also vibrating, and it was vibrating at the same frequency as the wailing sound wave. This was Long Haochen’s realization, which he called the Undulation of Light.

The inspiration he had just grasped was the wave rules and trajectory of the sound waves in the wailing, and the way the energy contained in the sound waves fluctuated. At this moment, he was replicating this mode of operation and trajectory onto his own spiritual power.

Although still very clumsy, the Holy Light Barrier’s support time doubled before it shattered under the bombardment of the sound wave.

An undisguised excitement appeared on his handsome face, and Long Haochen used the Holy Light Barrier for the second time. The previous time he came here was for understanding, and this time was for experimentation and cultivation.

With his extraordinary comprehension and perception, when he used the Holy Light Barrier for the fifth time, he was finally able to perfectly resonate with the sound wave, as if he was a part of the sound wave. Not only did he isolate the wailing sound from the outside, but he also isolated the impact of the sound wave.

The Holy Spirit Sword appeared in Long Haochen’s right hand, and spiritual power surged instantly. The Holy Spirit Sword was covered with a golden, hazy light, which was also rapidly vibrating according to the frequency of the Undulation of Light. Long Haochen clearly felt that even though he was driving the spiritual power in the same way, the consumption of spiritual power was double that of normal when using the Undulation of Light. However, the defensive power of the Holy Light Barrier had increased by more than double, even approaching the level of an elemental shield.

The most important aspect of releasing the Holy Light Barrier with the Undulation of Light was deception and cost-effectiveness. Although the consumption of spiritual power increased by double, the power could be comparable to a fifth-order magic. More importantly, the release time was still the short time it took to use the Holy Light Barrier.

Gently waving the Holy Spirit Sword in his hand, Long Haochen immediately felt a series of slight “buzzing” sounds from the sword body. The sound was not loud, but it strangely maintained the same frequency as the wailing sound from the outside.

With the protection of the Holy Light Barrier, the wailing sound no longer had any impact on Long Haochen. He moved sideways, came to the stone wall next to him, and stabbed the stone wall directly with the Holy Spirit Sword in his hand.

Suddenly, a scene that shocked Long Haochen appeared.

The Holy Spirit Sword, which was only a magical weapon, easily penetrated the stone wall like a hot knife through butter, without even making a strong friction sound.

Long Haochen knew too well about his own strength and the situation of the Holy Spirit Sword. Because of this, the shock in his heart was even stronger. He clearly felt that under the high-frequency vibration of the spiritual power attached to the Holy Spirit Sword, the stone wall seemed to dissolve when it penetrated. This feeling was very strange. It could be said that because of the existence of the Undulation of Light, the power of this stab of the Holy Spirit Sword was at least ten times stronger than under normal circumstances. And this was without using any skills.

Such a degree of increase was far from being comparable to the proportion of increased spiritual power consumption. Although Long Haochen also knew that if he was using skills, the increase from the Undulation of Light would not be so great, it was probably no problem to increase the power of all attack skills by one rank!

Imagine, is the Holy Sword skill at the sixth rank the same as the fifth rank? Under normal circumstances, the consumption of spiritual power for a sixth-rank skill is at least three to five times that of a fifth-rank skill. But the Undulation of Light only requires Long Haochen to spend twice as much spiritual power. Moreover, a fifth-rank skill that displays the power of a sixth-rank skill also has extremely strong concealment, and the release time only requires a fifth-rank skill.

This was Long Haochen’s first self-created skill, but without a doubt, this skill would potentially help him greatly.

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The light elemental sprite, Yating, flew out from Long Haochen’s chest, looking at Long Haochen with a look of surprise. She made some strange sounds with her small mouth. As Long Haochen’s contracted sprite, she could learn all the light elemental skills that Long Haochen could use. Obviously, she also felt the great effect of the Undulation of Light skill.

Gathering Light Aura was released, helping Long Haochen to recover his consumed spiritual power. Yating flew around Long Haochen excitedly. She felt very lucky to have such a master. For elemental sprites, the greatest desire is to continuously evolve and constantly improve their own strength. After having a human master, their evolution is closely related to the improvement of the master’s strength. If one day Yating’s cultivation can be improved to a certain extent, so as to evolve into a Sprite King, she can even cultivate a substantial body. At that time, the high elf race, which has been extinct for nearly ten thousand years, will reappear and continue.

You must know that although the number of elemental sprites is scarce on the Saint Demon Continent, they still exist. However, in nearly ten thousand years, none has been able to evolve to the level of high elves. And Yating was obviously feeling this hope from Long Haochen.

The wailing sound gradually faded and disappeared during Long Haochen’s cultivation process. Having the realization of the Undulation of Light greatly increased Long Haochen’s confidence. He retreated to the entrance of the cave, turned on the gem that could record images, and re-entered the cave. This time he did not stop, but directly jumped into the crack, while also releasing his Blue Rain, Light’s Hibiscus from his body.

The position Long Haochen chose to jump down was one he had been looking at for a long time. He was skimming down close to the rock wall. After about ten meters, the first foothold was already in front of him. He gathered spiritual power to make his body as light as possible. Long Haochen landed on it lightly, tiptoeing to dissipate the impact. A Light Cleaving Sword was slashed downwards for lighting purposes. He followed the sword and continued to skim down.

Yating flew beside Long Haochen, illuminating the surrounding situation while constantly chanting the Gathering Light Aura spell to help Long Haochen recover spiritual power.

What surprised Long Haochen was that the light element was so scarce in this Fearful Howling Cave. Even with his physique as the Son of Light and the light elemental sprite Yating who had evolved twice, the light element he could gather was pitifully small. It wasn’t even a third of what it usually was. Fortunately, his current consumption was not large, and with the nurturing effect of the Holy Guidance Spiritual Stove, new light elements could also be nurtured from his own spiritual power.

Long Haochen was very careful during the skimming process. In addition to observing with his eyes, he also carefully felt everything around him.

The deeper he went, the stronger the fierce spiritual power aura became. In the fierceness, there was also a bit of dead silence. Different from Caier’s killing intent, this death energy seemed to be emitted by the true aura of death, and Long Haochen had never felt that kind of fierce spiritual power aura before.

No one knew how deep this crack was. Long Haochen’s speed couldn’t be said to be slow, but he had been descending for a full half an hour. When the next round of wailing sound rang, he still didn’t see the end of this abyss.

It was pitch black all around, and the strong aura of death made Long Haochen, who was a light attribute, feel very uncomfortable. If it weren’t for the illumination of the light elemental sprite Yating and the Light Cleaving Sword he cast from time to time, the surroundings would be pitch black.

During the descent, Long Haochen saw several large demon corpses hanging on the rugged rocks. Obviously, these large demons also fell because they were affected by the wailing while exploring downwards.

Even Long Haochen, who was at the fifth rank and had realized the Undulation of Light, was beginning to feel a little strenuous after descending here, let alone these fourth-rank large demons. Even if that team of large demon cavalry had not been wiped out, they probably couldn’t do much here.

The recovery speed of spiritual power was far from keeping up with his own consumption. In the midst of the wailing sound, Long Haochen had to find a slightly flat place to sit down and rest.

(To be continued)

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