Xuantian Immortal Cultivation Record

As they spoke, a slight tremor ran through the ground beneath their feet. The magnitude was small, but for the two Core Formation cultivators who were closely monitoring the cave's condition, the movement was naturally very clear.

"Is this the exhalation of this world?" Fire Crow Daoist asked.

Zhang Yuanjing shook his head: "I've never seen it either. However, if a polar cave does exist underground, then this movement is very likely the world exhaling. According to the records in the sect's classics, different polar caves have different exhalation frequencies and magnitudes. This polar cave is quite small, so it should end soon."

Except for Yuan Zhilin and Zhang Yu, who were out playing with Ape Thirteen, the rest of the group were all cultivating in the wooden house.

The underground movement was so subtle that it didn't wake anyone.

Half an hour passed, and there was no second tremor from below. Zhang Yuanjing and Fire Crow Daoist exchanged a look, and then re-entered the cave through the spatial passage.

As soon as they entered, both of them felt a rich spiritual energy rushing towards them, incomparably pure. However, this spiritual energy was not a single attribute spiritual energy, but the most mellow five elements combined spiritual energy.

This spiritual energy filled the cave, but the rate of dissipation was also very fast. There seemed to be a powerful suction force around, constantly sucking away this spiritual energy.

"What a pity, if the dissipation were slower, a few Qi Refining juniors could enter this place to cultivate, one day would be worth a hundred!" Fire Crow Daoist sighed.

Zhang Yuanjing smiled and said: "This is transformed from the source material absorbed by this world, how can it allow cultivators to snatch it. Not to mention a day, it won't even last for a quarter of an hour before it dissipates completely."

After saying that, he took the lead and walked forward. The single attribute spiritual energy that had filled the area had all disappeared, presumably transformed by the exhalation of this world.

By the time the two of them walked to the front of the giant cave, the spiritual energy in the cave passage had disappeared completely, becoming very clean.

The two of them leaned over and looked down, and sure enough, there was a large cave with a radius of several dozen feet below, the middle was pitch black, and a cold wind blew from it, but the wind was not strong, and the wind speed was very slow.

This wind brought something in, causing a slight rumbling sound above the cave, and near the top of the cave, a small amount of single attribute spiritual energy had accumulated.

Zhang Yuanjing understood in his heart that this cave was the polar cave. Only the collision of the virtual air mechanism and the spiritual energy of heaven and earth could produce single attribute spiritual energy.

When this world absorbs void matter, it only leaves behind the source material, and other impurities are filtered out and discharged through the polar cave. However, there will always be some residue, which needs to be slowly refined by the spiritual energy of heaven and earth. And in the process of refining, the spiritual energy will also be impacted, thus producing single attribute spiritual energy.

Around the outside of the big cave was a circle of black giant rocks, because they had been impacted by single attribute spiritual energy for many years, there were many fine traces on them.

"Just these black rocks alone are excellent materials for refining spiritual weapons," Fire Crow Daoist said with emotion.

Zhang Yuanjing, on the other hand, focused on finding the passage to the mutated spiritual vein. This place seemed calm, but beneath the deep cave, it was connected to the endless void. Although, after the exhalation, this world had already closed it. However, this did not mean that the demons in the void could not force their way in.

Soon, in the southeast corner of the big cave, he found a recessed stone wall. When his divine sense went into the stone wall, there was indeed another world inside.

"Senior, over there!"

He moved and swept over, quickly arriving in front of the stone wall. On the side was a crack, just enough for one person to enter sideways.

Inside was a winding space, sometimes large, sometimes small, sometimes straight, sometimes curved, but from the direction of progress, it was always going upwards at an angle.

The two of them moved extremely fast, following this space that was either eroded by spiritual energy or naturally existing, they quickly ascended more than two thousand feet.

The surrounding spiritual energy gradually became richer. The two knew that they were very close to the mutated spiritual vein.

After ascending another five hundred feet, a red dragon suddenly appeared above, piercing through the stone wall, and then burrowing into the giant rock in front. The section left outside was only a little over a foot long. However, it contained a majestic fire spiritual energy.

"It's a fire-type spiritual vein!" Fire Crow Daoist shouted in surprise, but a trace of disappointment quickly flashed in his eyes, "Unfortunately, it's just an ordinary spiritual vein, no spiritual essence has been produced."

Zhang Yuanjing quickly said: "Senior, don't worry, this is just the lower end of the spiritual vein. There must also be a water-type spiritual vein here. To produce spiritual essence, it must be at the intersection of the two spiritual veins, the most essential place of the spiritual veins must be there."

At this time, the space in front turned to the left, no longer going upwards. The two walked three or four hundred feet, and suddenly heard the sound of flowing water in front.

Zhang Yuanjing said with joy: "Senior, that may be the underground river that Du Xiangyuan entered."

Fire Crow Daoist nodded: "That mutated spiritual vein should be there. Otherwise, the debris in the spiritual vein would not be able to enter the Crimson Creek River."

Zhang Yuanjing sighed: "If this place wasn't so special, with such intricate and interconnected spaces, unless you knew that there was a spatial passage in that stone mountain, who would be able to find this polar cave! This Du Yuanxiang, in order to dig out the secret of the Crimson Fin Fire-纹 Fish, actually found this underground river, thus discovering this polar cave, this person can be regarded as a remarkable figure!"

Fire Crow Daoist laughed: "This person still lacks some knowledge. If he had as deep a heritage as Yuanjing, he would never have refined himself into a tree spirit."

Zhang Yuanjing shook his head and said: "Senior, that's hard to say. When this person entered this place, it should have been not long after the polar cave had just exhaled. At that time, although there were tree spirits absorbing it, it might not have been impossible to produce spiritual essence. However, even if there was spiritual essence, the probability of breaking through to the Core Formation realm would be very small."

Fire Crow Daoist revealed a hint of melancholy, then smiled freely and said: "Unless you have Yuanjing's kind of opportunity, who can say for sure that they will break through to Core Formation. Being able to increase the probability by a little is also considered my responsibility as a master to my disciple!"

Passing through the crisscrossing giant rocks, a three-丈 wide stream of water appeared in front of the two. One end of the stream disappeared into the ground on the right side of the two. The other end was hidden behind a giant rock that sloped downwards into the soil on the left side.

Going around the giant rock, there was a slightly more open low-lying area, filled with water. The river ended here.

Zhang Yuanjing and Fire Crow Daoist could see clearly that in this pool of water, a red and a black spiritual vein were intertwined, disappearing into the mountain on both sides. And from the mountain, dozens of roots as thick as hair ties extended from both sides, deeply rooted in the pool of water.

The two looked closely, and there was nothing with obviously abnormal color in the two spiritual veins.

Zhang Yuanjing sighed in his heart, knowing that he would definitely return empty-handed.

Fire Crow Daoist was unwilling to give up, staring with his eyes, gathering his divine sense, and plowing through these two spiritual veins back and forth several times, confirming that there was really no spiritual essence, then shook his head and said disappointedly: "I didn't expect to waste so much effort!"