It is very difficult for two third-level inscription masters to jointly arrange the fourth-level formation, and the two people not only need to engrave many inscription runes, but also need to devote a part of their energy to pay attention to the fit of each other's inscriptions.

If there is an error in the engraved inscription, or if there is a problem with the fit in the process of combining the formation, it will lead to the failure of the formation.

Fourth-level inscription masters are extremely rare even in Zhongzhou, the holy land of martial artists, and some forces have to pay a great price if they want to ask such an inscription master to help arrange the formation.

Sometimes, even if you pay a great price, if the fourth-level inscription master is in a bad mood, he will not make a move.

Some of these power sects did not move the fourth-level inscription masters, and the second thing to retreat from was to invite several third-level inscription masters to join forces to arrange the fourth-level formation.

Even the simplest fourth-level inscription array requires the cooperation of four inscription masters, each of whom is responsible for an inscription column.

Even so, there is a huge failure rate when combining formations.

So at this time, Yi Feng and Su Yan were both under tremendous pressure compiling inscriptions.

In the open space in front of the bluestone gate, the four inscription columns are arranged diagonally, and Yi Feng is responsible for the compilation of the inscriptions on the two inscription pillars in the southeast corner.

At this time, Yi Feng's expression was solemn, and the gray-green spiritual power surged in his palm, and between the finger hooks, mysterious lines appeared in the void, and these lines were intertwined with each other, and dozens of lines were intertwined into an intricate inscription.

After an inscription rune was formed, Yi Feng carefully controlled it with his soul power, and then printed it on the inscription pillar.

Su Yan in the northwest corner also looked solemn, but the speed at which he engraved the inscription was much faster than Yi Feng, obviously, for this formation, he had put in the effort to practice.

The level 4 inscription was far more complex than the level 3 inscription, and the level 4 formation was even more complicated.

A top-level third-level formation only requires about five hundred inscription runes, while a fourth-level formation requires a terrifying six hundred inscription runes on a single inscription array.

Just one inscription pillar of the inscription rune is more than a third-level formation!

Yi Feng gradually became proficient from being rusty at the beginning, and although the speed of compiling the inscription was not as fast as Su Yan, it was much faster than before.

Half an hour had passed, and the inscription of an inscription pillar was still the last one missing.

Yi Feng couldn't wipe the sweat off his forehead, his fingers hooked, and the last inscription rune slowly formed.

He took a deep breath and controlled the inscription rune towards the inscription pillar.

Yi Feng's heart was suddenly startled, and there was a slight deviation in the position where the last inscription rune fell, causing the entire inscription pillar to tremble slightly.

The other engraved inscriptions were also flickering in the dark.

Yi Feng swallowed a mouthful of saliva with some difficulty, staring at the inscription pillar nervously, the trembling of the inscription pillar gradually stopped, and Yi Feng's heart gradually let go.

Fortunately, one was completed without danger!

Yi Feng took out a soul pill and took it, recovering his soul power, if it wasn't for the support of the soul pill, he would definitely not be able to complete it.

With the experience of carving the first inscription pillar, the speed of the second Yi Feng was much faster, and the movements of the whole person were like flowing water, and one inscription rune after another was imprinted on the inscription pillar.

Nearly half an hour passed, and Yi Feng finally completed the inscriptions on the two inscription pillars.

He turned his head slightly, seeing that Su Yan was already finished, and when he saw him turn around, he smiled at him.

However, Yi Feng could feel that there was a hint of nervousness in Su Yan's smile, because the next step was the most important and the most likely to fail, the combination of the inscription array.

There were only two of them, which meant that they had to juggle more of the inscriptions.

Yi Feng took a soul pill again to restore his soul power to its peak state, and then he wanted to implement it in the best state.

"Yi Feng, are you ready, victory or defeat is here!" Su Yan said in a deep voice.

"Wait!" Yi Feng took a deep breath, took out three soul pills and put them in his mouth, and said inarticulately: "It's okay!"

Su Yan saw Yi Feng's actions clearly, and glanced at Yi Feng gratefully. After all, it didn't take long for Yi Feng's soul to reach the subtle realm, and the strength of his soul power was far inferior to him, and Yi Feng held the soul pill in order to prevent the lack of soul power, which could be replenished in time.

"Let's start!" Su Yan snorted softly, his hands were knotted with Xuan Ao's handprint, and the inscription runes on the inscription pillar behind him suddenly flashed with bright light. The aura around the pillar began to fluctuate, as if forming a thread of aura, which was connected with the inscription runes on the pillar.

The same scene also appeared on the inscription pillar behind Yi Feng, those dense spiritual energy threads danced, and then under Yi Feng's control, they slowly stretched out into the air.

At this time, Yi Feng's face gradually turned white, extending the spiritual energy silk thread in this way, the consumption of soul power was particularly terrifying.

Yi Feng's soul power was drained out all of a sudden, but fortunately, he had the soul pill in his mouth, and he took one in time to replenish the consumption.

The spiritual energy threads on both sides were slowly approaching, and Su Yan was also not easy, and the sweat on his forehead had dripped down his cheeks and fell to the ground.

Both of them gritted their teeth and persisted, and the silk threads of the aura slowly approached, allowing the latter to begin to intertwine in an extremely mysterious trajectory.

Yi Feng swallowed another soul pill, even so, the replenished soul power was quickly consumed, and the degree of consumption of soul power by the combined fourth-level formation far exceeded Yi Feng's imagination.

Yi Feng didn't hesitate, and quickly swallowed the remaining soul pill.

The threads of the aura were still intertwined, gradually intertwining into a net, and Yi Feng knew that when the mesh was completely intertwined, they would succeed.

Yi Feng bit the tip of his tongue and forcibly removed the feeling of dizziness in his head, and the green tendons on his forehead were obvious.

Obviously, Yi Feng had reached his limit, and he was barely supporting it at this time.

"Hurry up, hurry up, it'll be done soon!" Seeing that the last two silk threads of the aura were closed, it was about to be completed.

In the midst of exhaustion, Yi Feng was also a little surprised, he and Su Yan jointly completed a fourth-level formation, which was enough to be proud!

Another thread of spiritual power is slowly closing, and it is only a stone's throw away from the final success!

And at this moment, something happened suddenly, and the spiritual energy silk thread on Su Yan's side was slowly shortening, and the spiritual energy silk thread that had been joined together also became extremely unstable, as if it might spread out at any time.

The sudden change made Yi Feng shocked, he looked at Su Yan, only to see that Su Yan's expression was a little hideous, and the green tendons on his forehead were rising, obviously suffering a great deal of pain.

"Su Yan, you are very good at what you do, and you are actually trying to calculate me? You are just a wisp of my soul, you should have enlightenment!" A cold voice sounded in mid-air.

Yi Feng's face was also difficult to look at, obviously at the most critical moment, what did the person who sealed it do to Su Yan?

"I won't be at your mercy, I'm me, even if I'm a wisp of your soul reincarnation, I'm still just Su Yan!" Su Yan gritted his teeth, almost squeezing out this sentence from between his teeth.

His eyes were unyielding, and the area around his eyeballs was bloodshot.

At Su Yan's insistence, the spiritual energy threads that had been joined began to stabilize, and the gradually shortening spiritual energy threads also had a tendency to grow slowly.

"Hmph, you think I'm going to have nothing to do with you?"

As this voice sounded, Su Yan suddenly held his head and screamed in pain, and the sound made Yi Feng's scalp on the side tingle.

But something more troublesome happened, Su Yan's sudden time and space, those spiritual energy threads that had been joined violently shook violently and became crumbling.

Boom!

As if it was the sound of a taut rope suddenly breaking, a joined thread of spiritual energy opened, then a second, a third......

No matter how Yi Feng controlled, he was powerless to stop it.

After a painful howl and struggle, Su Yan's face was as pale as paper, and he gradually regained his calm, but he sat weakly on the ground.

The look of dead ashes is obviously extremely decadent. Although he had gotten rid of the means that the soul flame had used on him, he no longer had the strength to control those spiritual energy threads.

"Hmph, you still have some ability, you actually hurt your soul to get rid of the ban, but your formation also failed. It's only a matter of time before I rush out of here, and when I get out of trouble, Su Yan, you won't be able to escape!"

Obviously, the person who sealed it used to use the means through the seal, I am afraid that he would also have to pay a great price, if he directly oppressed with that terrifying momentum like the first time he appeared, Yi Feng and Su Yan would be in danger.

After all, the backlash of the fourth-level formation is also extremely terrifying!

Su Yan looked at the broken spiritual energy threads with empty eyes, obviously the formation had failed, and in the end, all the efforts were in vain.

"Su Yan, you cheer up Lao Tzu, we haven't failed yet!" Yi Feng was still working hard, but his efforts were only delaying the breaking speed of the spiritual qi silk thread.

"Thank you, Yi Feng, but I've failed, I don't have the strength anymore!" Su Yan smiled miserably.

"Damn!" Yi Feng couldn't help but curse secretly, and shouted: "You stand up for Lao Tzu! Aren't you still dead? How can you say that you have no strength!

Su Yan seemed to be touched by Yi Feng's spirit of not giving up, gritted his teeth and wanted to stand up, but after struggling, his body fell to the ground again.

Looking at Su Yan's embarrassed appearance, a trace of madness surged in Yi Feng's eyes, "Su Yan, you remember to Lao Tzu, you must destroy that bastard of Soul Yan!"

Yi Feng's handprint changed, and once again he ran the ethereal technique, and began to hook the ancestral wood inscription that was quietly suspended in the dantian.

"Give me a reaction!" Yi Feng roared in his heart, the ethereal spirit technique was running wildly, and finally, the ancestral wood inscription flickered, and there was a slight reaction.

Yi Feng felt the faint connection with the ancestral wood inscription, smiled slightly, and then the spiritual power in his body poured into the ancestral wood inscription, and the gray-green spiritual power turned crystal green after passing through the ancestral wood inscription.

"Fusion!"

At this moment, spiritual power and soul power began to merge, and the momentum around Yi Feng's body began to rise.

In order not to admit defeat, you have to go crazy once for anything! Even if you risk your life!