The huge "sun" in the sky slowly lost its light and gradually entered dusk.

When the last of the afterglow vanished, the entire Soul Refining Valley was plunged into darkness.

However, after half an hour, a small half of the "sun" in the sky gradually began to bloom with a faint light, like a crescent moon, sprinkling silver-white brilliance......

This mysterious treasure refined by Gong Liantian, the ancestor of the Soul Refining Valley, was able to transform the sun and moon with the passage of time, and vividly reflected the twelve hours.

In the room, Xia Yin, who had finished his cultivation, pushed the door and walked out, and saw his apprentice Yin Yang Po sitting at the door, staring blankly at the crescent moon in the air that was gradually full.

"Xiao Po, why don't you go to sleep yet?" Xia Yin asked.

"Sleep, there are still two hours before it's time to go to bed, Master!"

Obviously, Yin Yang Po has not yet realized that the moon rises, which is the night of sleep, and his work and rest have almost formed an extremely natural law in his body, every eight hours, he sleeps for four hours, and then gets up to start the day's work......

Almost the entire mortal body of the Broken Yuan Land has formed this kind of law in their bodies, and they can sense it accurately without any timekeeping equipment.

Because in the Broken Yuan Land outside the Soul Refining Valley, there is no sun and moon, and there is no difference between day and night.

"This ...... Xiao Po, do you know that in Master's original world, as long as the sun sets, after dark, it is time to sleep, until the sun rises the next day, and then get up to work again!"

Next, Xia Yin pointed to the crescent moon in the sky and told Yin Yang Po about the change of the sun and the moon......

In the end, Yin Yang Po was persuaded by the master and obediently went back to the room and went to bed.

Xia Yin, on the other hand, sat directly cross-legged outside the door and continued his cultivation......

Early the next morning, Nanohiro appeared at the door early in the morning.

Xia Yin had just finished his cultivation.

"Zhang Daoyou, Cai was ordered to come and take the two of them to the Hidden Scripture Pavilion to select spiritual secret skills!"

Xia Yin's spirit was shocked, and then he said loudly: "Xiao Po, hurry up!"

The door of the room opened in response, and Yin Yang actually spent the whole night looking at the moon, and he didn't fall asleep, but he stayed in the room for fear of disturbing his master's cultivation and didn't come out.

Under the leadership of Cai Zhihong, Xia Yin and Yin Yang Po came to the front of a stone cave halfway up the mountain, and saw an elderly monk sitting at the entrance of the cave.

Xia Yin was surprised to see that the old man had mysterious magic patterns all over his body, covering almost everything outside his clothes, except for his face.

"Old Sun, this Zhang Daoyou came to choose a spiritual secret technique, and the ancestor has already agreed to this matter!"

The old man opened his cloudy eyes, nodded slightly, and closed them again.

"Zhang Daoyou, the forbidden land of the Tibetan Scripture Pavilion, it is inconvenient for Cai to enter, please take care of yourself!"

Xia Yin thanked him, and the outline broke into the hole with yin and yang, and Cai Zhihong spoke again: "By the way, the ancestor said that in addition to this little friend can choose a spiritual secret technique, Zhang Daoyou can choose some classics about the method of soul refining and bring them back to observe, otherwise you will not be able to assist the ancestor in the future!"

Xia Yin asked suspiciously, "What is the Soul Alchemy Technique?"

"It's a refining weapon!" Cai Zhihong obviously didn't expect Xia Yin to ask this question.

"Oh, Zhang knows!"

Xia Yin said, and then pulled Yin Yang Po and walked towards the cave......

"The art of soul refining should be a brand new refining method that is different from the refining weapons of the outside world, it seems that I was forcibly stranded here this time, and it is not without benefits!"

Xia Yin was secretly happy in his heart.

That Gong Deyuan is a direct descendant of Gong Liantian, and he has obviously gained the essence of the old ancestor's refining, if he can follow this old guy to learn refining, isn't it exactly what he once wanted to learn but didn't have time to learn?

Walking into the cave door, Xia Yin found that the space in the cave was not very large, there were more than fifty black shelves of unknown material, which were full of jade slips and classics.

Xia Yin walked to the shelf, picked up a jade slip, and injected spiritual power......

Soul Blitze, an intermediate spiritual secret technique, can evolve an invisible spiritual power arrow to attack the enemy's soul, and is powerful......

Xia Yin put down the jade slip, and a strange look appeared on his face.

The first jade slip actually recorded the secret technique of soul blitz.

This is the secret technique that Gong Buji used to attack his soul at the beginning, and it is indeed extraordinary!

However, Xia Yin was choosing the right spiritual secret technique for Yin Yang Po, which was obviously not suitable for ......

Xia Yin picked up the second jade slip.

The Soul Separation Technique can make the enemy schizophrenic, cultivate to the highest level, and directly strip the enemy's soul......

Along the way, the shock on Xia Yin's face became heavier and heavier!

Dark Moon Arrow, Heartbreaker Bow, Soul Reaver Cone......

All kinds of spiritual secret techniques that emerge in an endless stream are sharp exercises that directly attack the soul and put people to death, and these spiritual secret techniques are all killing people invisibly!

Moreover, Xia Yin also browsed a large number of classics, almost all of which were various codexes about the art of soul refining, which were obviously the experiences and insights left by the monks of the Soul Refining Valley in the past dynasties.

However, after most of the day, Xia Yin searched the jade slip classics in the entire cave, but did not find a spiritual secret technique suitable for Yin Yang Breaking cultivation.

All secret techniques often require decades of penance from a young age to achieve a small success, or they need all kinds of spiritual power talents to cultivate......

And Yin Yang Po, obviously has missed the best cultivation period, now let him start to cultivate some kind of secret technique, at least decades, how can he have so much time to wait, not to mention that Yin Yang Po's spiritual power has also been investigated, although there is something weird, but it has nothing to do with being powerful, and it is impossible to cultivate these classics from the source......

Looking at the master's more and more solemn expression, Yin Yang Po also realized that he didn't seem to be the "blessing" of becoming an immortal master, so he comforted Xia Yin instead: "Master, forget it if you don't have it, anyway, Xiao Po is already very satisfied with following the master every day!"

This sentence deeply pierced Xia Yin's heart.

Next, Xia Yin carefully investigated again without believing in evil, until the light of the sun in the sky gradually dimmed, and the room gradually darkened, and he still failed to find a spiritual secret technique suitable for Yin Yang Break......

This time, Xia Yin was really desperate.

Could it be that this apprentice of his own really has no chance to cultivate?

Under the urging of Yin Yang Po several times, Xia Yin took a few classics on the art of soul refining and walked to the door of the cave.

The old man, covered in demon patterns, was like a statue, and he never moved from morning to sunset.

Xia Yin walked up to the old man and said softly: "Seniors, these classics, juniors will borrow them for a while!"

The old man snorted, and there was no movement......

Xia Yin nodded slightly in thanks, and took the lead out of the cave.

However, just as Yin Yang Po walked past the old man, the magic pattern on the old man's body actually shone slightly......

The old man was shocked, his originally closed eyes opened suddenly, and two rays of light suddenly shot out of his cloudy eyes!

Because Xia Yin was in front and did not release his spiritual power, he naturally didn't know this scene.

But the old man looked at Yin Yang Po who walked out a few meters away, his old face trembled slightly, and the expression on his face seemed very hesitant......

In the end, the old man still sighed slightly, and then opened his mouth slightly, and a heart shape covered with magic patterns quietly spat out, submerging from the back of the Yin Yang Break......

Watching the unaware Yin and Yang break away, the old man muttered to himself: "I can't imagine that my dignified No. 1 Sect in the Netherworld, when I have fallen to such a point, I can still find such a perfect heir, and it is not in vain!"

After saying this, the old man's already old face changed rapidly, and he looked like a thousand-year-old dried corpse dug up from a grave, and he was completely angry......

Xia Yin and Yin Yang Po walked down from the halfway waist of the mountain peak, and along the way, Yin Yang Po's stomach gurgled uncontrollably.

When Xia Yin looked at his apprentice, Yin Yang Po covered his stomach with a little blush, as if he was blaming this unfortunate stomach.

Xia Yin couldn't help but pat his forehead: "Alas, Master is so confused, he forgot that you still have to eat every day!"

Yin Yang Po also laughed a little embarrassed.

He hadn't eaten anything since yesterday, and he was already hungry, but the master didn't speak, and the young man was embarrassed to talk about it.

Fortunately, when the master and apprentice returned to the wooden house, they found that several plates of food had been placed on the small table in the room, including meat and vegetables, and a large bowl of rice.

"Zhang Daoyou, yesterday Cai was negligent and forgot that your apprentice was going to eat, I'm really sorry!" a voice sounded from the storage ring.

Xia Yin flipped his right wrist, and the communication bead full of holes appeared in his hand, and then he came to his mouth, and said with a smile: "Thank you, Cai Daoyou, Xia only remembered this now!"

"Hehe, Zhang Daoyou rest assured, in the future, three meals a day, Cai will arrange someone to send them!"

This sentence made Xia Yin finally let go of his thoughts and thanked him from the bottom of his heart.

When he put away the communication beads, Xia Yin was stunned to find that his apprentice had already dismissed most of the bowl of rice, and the dishes on the table had almost been swept away.

"Master, the apprentice knows that you don't need to eat, so I'll eat them all!"

Xia Yin smiled and nodded: "Well, let's eat, go out for a walk by yourself when you're full, remember to go to bed on time when it's dark, Master has to study these classics carefully!"

Yin Yang Po nodded continuously, and after eating all the things on the table, he walked out of the door and walked around.

After a while, a young man with a short stature walked in, and after saluting Xia Yin respectfully, he quickly took away the dishes and chopsticks on the table......

Xia Yin came to the side of the small table in front of the window, sat down, and then took out the classics selected from the cave, selected a classic book called "Soul Refining Initial Solution", and began to read it carefully.

The hands and feet of the monks......

There are thousands of ways to refine the weapon, and the root of it is to give life and soul to the object, and there are different methods, and there are traces to follow, which is nothing more than carving the array into the device, melting the spirit into the device, giving the object to accommodate the aura of heaven and earth, and the yuan force for its own use......

The method of soul refining is another method that is different from the magic weapon and spirit weapon, which began with refining the ancestor in the soul valley, and the later generations were blessed by the ancestors, and the art of soul refining was inherited and carried forward......