Zhang Mu was briefly surprised, and began to fly towards the front stealthily, wanting to see how big the space on the fourth floor was.

After flying a stick of incense, I couldn't see where the cliff of the fourth layer was at all, and I sighed that the large space of the fourth layer might be wider than the first three layers combined.

Feeling the evil aura around him getting stronger and stronger, I wanted to see what the fifth floor would be like.

So, after discerning the direction, he began to fly westward.

For some reason, the direction of each layer of the Demon Cultivation Cave points to the west, which means that as long as you keep flying west, you can find the cliff to the next layer.

On the way to fly, Zhang Mu saw several iron-refining corpse demons without spiritual intelligence appear in the fourth layer, his brows furrowed slightly, and he muttered to himself.

"How the hell did these corpse demons get to the next level? Why do some have wisdom and others don't? ”

As for the secret of the advancement of the corpse demons, everyone in the Bloodthirsty Demon Palace once believed that as long as they devoured each other, they could advance.

But some people think that as long as they stay in the demon cave for a long time, they will naturally advance.

During this period, some people also asked about the corpse demons such as iron smelting and red copper who had obtained spiritual wisdom, and some of them said that they had completed the advancement after devouring other corpse demons, and some said that they had suddenly advanced to the next level without realizing it.

This result is similar to the two situations that everyone speculated, and no one can say exactly which reason led to the advancement.

In the end, there is no accurate conclusion as to the reason for the advancement of the corpse demon.

As for how to obtain the spiritual wisdom, not only the people in the Bloodthirsty Demon Palace couldn't say why, but even the corpse demons themselves couldn't say clearly.

Perhaps this secret is only known to the Bloodthirsty Dao people.

Zhang Mu flew for a long time, and finally came to the cliff of the fourth layer.

Carefully drifting against the cliff wall and falling, when he reached the ground of the fifth layer, it actually took half a pillar of incense.

After a rough estimate, the difference between the fourth and fifth floors reached an astonishing more than 3,000 zhang.

As far as the eye can see, the mountains in the fifth layer are undulating, as if they were a land buried in the ground.

When I looked up, I was filled with gray mist, and I couldn't see the rock cliff dome above.

Moreover, the evil qi in this layer was more than five or six times stronger than that in the fourth layer, and the cold meaning seemed to have a tendency to condense into frost.

Zhang Mu flew forward for a distance, stopped on a small mountain peak five or six hundred zhang high, glanced at the surrounding landforms, and felt that there was weirdness everywhere here.

Even though he now has the cultivation of building a foundation, a creepy feeling rises in his heart at this moment.

As time went on, the feeling grew stronger.

Zhang Mu immediately decided to turn around and go back, and after his cultivation was improved in the future, he would come over to find out.

When he came to the ground, he immediately sacrificed the colorful sky feathers and flew in the direction of the boundary mountain.

Because of the experience of crossing when I came, I didn't encounter too many twists and turns when I went back.

Half a month later.

Zhang Mu smoothly returned to the sky above Beishan Town, put away the colorful empty feathers, descended at the door of the pavilion, and walked into the hall.

Seeing that Yu Shuang was alone at this time, he asked.

"Sister Yu Shuang, your brother is still in retreat?"

"Inspector Zhang, you're finally back!" When Yu Shuang saw Zhang Mu returning, he first jumped with joy, then nodded and said, "Well, it's still in retreat." ”

"During your brother's retreat, was anything going on in Beishan Town?" Zhang Mu asked.

Yu Shuang shook his head and said, "Everything is as usual, but it's nothing." ”

"It's okay, I'm going to stay here for a few days, I don't know if Sister Yu Shuang is welcome?"

Zhang Mu plans to refine the precious sword fetus in Beishan Town in the few days when Yu Lechuan has not yet left the customs.

Yu Shuang's eyes widened in surprise and said, "Really? Inspector Zhang really wants to stay here for a few days? ”

Zhang Mu nodded and said with a smile: "Of course it's true." ”

"Great." Yu Shuang jumped up happily and said, "I'll clean up the guest room for Inspector Zhang now, and prepare a meal by the way." ”

After speaking, he immediately ran into the back hall of the pavilion happily, for fear that Zhang Mu would regret it.

Zhang Mu looked at Yu Shuang's back and smiled lightly, sighing that Yu Shuang and Yu Lechuan are worthy of being brothers and sisters, and the two are more enthusiastic than the other.

...

It's night.

Zhang Mupan sat on the bed in the pavilion room, because he didn't know how much movement would appear in the sacrificial treasure sword fetus, so he laid several shielding spiritual curtains before the sacrifice to avoid unnecessary trouble because the movement was too big.

When everything was ready, he took out the sword weapon retrieved from the Demon Cultivation Cave.

After staring at it for a moment, he began to close his eyes and communicate the high-spirited sword intent on this sword weapon.

Slowly, the sword weapon lit up with a touch of brilliance.

Zhang Mu opened his eyes at this time, took out the treasure sword fetus, and placed it on his knees.

With a move of his mind, he suspended the sword weapon above the treasure sword tire, and began to transfer the wisps of mysterious sword intent to the treasure sword tire below.

As the clean and pure sword intent slowly flowed into the sword body of the treasure sword fetus, the body of the treasure sword fetus began to light up with dazzling blue light, and there seemed to be an inaudible sound of sword roar faintly.

And so on for almost an hour.

The sword suddenly "ping" sounded, and it shattered into more than a dozen broken blades.

Seeing this, Zhang Mu showed a touch of joy on his face, which meant that all the sword intent on the sword weapon had been transferred to the treasure sword fetus.

I didn't have time to brush off the broken blade that fell on my leg, and I immediately immersed myself in the precious sword fetus.

Over and over again, he cultivated that clean and pure high-spirited sword intent.

Gradually, this Proud Sword Intent was like a vibrant seed, slowly taking root and sprouting in the Treasure Sword Fetus, and slowly spreading to all parts of the Sword Body of the Treasure Sword Fetus.

I don't know how long it took.

The dazzling blue light on the treasure sword tire became brighter and brighter, almost reaching the point of substance, as if it was a pool of clear water, floating back and forth among the several obscuring spiritual curtains.

It went on for another moment.

When the Noble Sword Intent in the Treasure Sword Fetus completes its transformation, the Treasure Sword Fetus begins to absorb water like a long whale, retracting all the green light into the sword body.

With the sword body shaking slightly, and at the same time emitting a pleasant melodious sword sound, the precious sword fetus was finally completed at this moment.

Zhang Mu opened his eyes when he heard the sound, and his hands supported the treasure sword fetus that was as clear as water, and stared happily for a moment.

With a move of his mind, Edgeworth stepped under his feet and flew out of the pavilion room like a gust of wind.

Rising to a thousand feet in the sky, looking at the land covered by the vast night, the treasure sword fetus was summoned back to his hand and flicked his fingers.

Bite!

A sword roar as crisp as a dragon's roar fluttered in the wind.

"Who plays the sword like a dragon and scatters into the blue sky and the world!"

Zhang Mu groaned lightly, the joy on his face could no longer be suppressed, and then he laughed heartily.

After expressing the happiness in his chest, he held this treasure sword fetus that was a combination of heart swords, and said in his mouth.

"How can the three-foot green peak be nameless!"

After a pause, he waved his sword and pointed to the sky, and said word by word.

"Amazing!"

As the word "Amazing Immortal" was pronounced, the sword body trembled slightly, as if it was jumping.

Zhang Mu felt the joyful sword intent in the body of the Amazing Immortal Sword, and countless joys flowed on his face, and after a long time, when his mind gradually calmed down, he slowly put away the sword and returned to the room.

Subsequently, while warming and strengthening the high-spirited sword intent in the Amazing Immortal Sword, he quietly waited for Yu Lechuan to come out.

Three days later.

Outside the room where Yu Lechuan was retreating, bright brilliance suddenly squeezed out of the cracks, and from time to time there was a trace of golden light floating out of it.

Zhang Mu and Yu Shuang sensed the movement and came to the backyard of the pavilion one after another.

When Yu Shuang saw this scene, he asked Zhang Mu worriedly.

"Inspector Zhang, what's wrong with my brother?"

Seeing this scene, Zhang Mu understood that this was a sign that Yu Lechuan was about to build a successful foundation, and said happily to Yu Shuang.

"Don't worry, your brother has nothing to do!"

Yu Shuang looked at the occasional glimmer of golden light wafting out of the room, and asked again.

"Inspector Zhang, what's going on with all this golden light?"

Zhang Mu didn't expect Yu Lechuan's fortune to be so deep, and when he built the foundation, he realized the artistic conception of "Jinpu Foundation", so he explained.

"These are the outward manifestations of Jin Guang's sincerity, which shows that if your brother succeeds in building the foundation, his future achievements will definitely be limitless!"

Yu Shuang nodded as if he didn't understand and said.

"Will my brother succeed in building the foundation?"

When Zhang Mu first built the foundation, it seemed to be very smooth, and he did not encounter any danger, which was actually due to the profound heritage and the incomparably mysterious "Ming Dao Shangjing".

If others want to build a foundation, it is naturally not so easy, and the process is not an exaggeration to describe it as walking on thin ice.

Zhang Mu heard Yu Shuang's inquiry, and was not sure whether Yu Lechuan could succeed for a while, seeing that Yu Shuang was very concerned about Yu Lechuan's expression, he smiled and said.

"It's going to work!"

Yu Shuang received Zhang Mu's affirmative reply, and his heart suddenly settled down a lot, but he still clenched his nervous little hands and silently prayed for Yu Lechuan in his heart.

The two waited outside for half a ring.

The light in the room began to slowly dissipate, and there was silence for a moment, and the door opened.

Yu Lechuan walked out of the house with a smile on his face, and when he saw the two of them, he smiled happily and said, "It's finally worth more than ten years of hard work!" ”

Zhang Mu saw that there was still a trace of imperceptible golden light in Yu Lechuan's eyes, and said happily: "Congratulations to Yu Ting for his success, and his cultivation will be smooth in the future!" ”

"Brother, you really succeeded!" Yu Shuang came to Yu Lechuan's side, looked around Yu Lechuan, and said happily: "My brother is a real person who builds the foundation!" ”

Yu Lechuan looked at Yu Shuang and shook his head and smiled, and said to Zhang Mu: "My sister, this child's temperament, I hope that Inspector Zhang will not laugh." ”

Zhang Mu laughed and said, "How come." ”

The three of them stood in the courtyard and chatted happily for a while, and Yu Shuang ran into the back hall in a hurry, ready to make some spiritual food to catch Yu Lechuan, who had successfully built the foundation.

Zhang Mu and Yu Lechuan came to the main hall of the pavilion together and discussed business.

"Yu Tingling has now successfully laid the foundation, and now he is ready to take over the position of the county governor of Heishi County." Zhang Mu said.

Yu Lechuan looked at Zhang Mu with bright eyes, nodded, and said, "It's all up to Inspector Zhang's arrangement." ”