Lu Qing felt that he had been out of body for a long time this time, and he was about to reach his limit.

Originally, it would take a day and night to go back and forth to this water ghost lake, but Lu Qing calculated the time, came on the eve of the battle, watched the battle, and waited for Lu Chaoxi to take the marrow water jade. I should have gone back, but I found that this underground spiritual stream, I didn't hold back, and went down to investigate......

If you don't rely on karma to replenish it, you will definitely not be able to go back.

But fortunately, today's battle did not use the expensive exchange item of [Enlightenment Power], and Lu Qing still had more than 300 karma points in his hand, so it was enough to spend.

So, he thought about it for a while, and flew away towards the upper reaches of this spiritual stream.

He wanted to find out where the source of the Spirit Creek was.

Miraculously, the more you fly, the more you go down.

This spiritual stream actually flows from low to high!

Lu Qing was a little surprised, but that's it. There are many places in this world that cannot be guessed by the common sense of the earth in the previous life. Under spiritual power, aura, and immortal law, anything magical can happen.

He kept drifting along the Spirit Creek for a whole day, and after his karma was replenished once, he couldn't find out where the source was. The lower he went, the more intense the aura became, and after flying for a day, the water aura escaping from this spiritual stream had almost reached the level of a fourth-order spiritual vein. When Lu Qing was alive, the Jade Smoke Mountain that he had personally cultivated was only a fourth-order spiritual vein.

But despite this, this is still not the source, and there is no new sign at all, the intensity of the spiritual energy has been slowly increasing, and I don't know how far this spiritual stream buried deep in the ground has flowed.

After thinking for a moment, Lu Qing had to stop.

He has to go back.

As a Jindan monk during his lifetime, of course, he was not worried that he would lose his way and find his way back. But after all, he is only a spirit body now, and he can't leave the Jade Smoky Mountain for too long, if he is too far away, he will spend too much spiritual power for no reason when he goes back.

He can only regret his resignation.

He estimated the time and distance, it had been almost two days since he went out of the mountain, and he had to estimate that it would take at least two days to go back, adding up to four days of floating outside, and the fourteen points of karma were gone......

But it's not too much of a loss.

Not to mention the secret in the depths of this spiritual stream, just the current discovery is already a great fortune.

In the depths of this spiritual stream, there must be some secrets, and from Lu Qing's eyes, it is very likely to be an undeveloped and unknown cave blessed land.

If you can continue to explore, you will definitely be able to obtain huge benefits, even far more than a piece of penalty water jade. Even, Lu Qing thinks that this piece of marrow water jade is not something that Lingxi has gradually cultivated over thousands of years.

He was very interested in it, and if he was still alive, he would definitely continue to explore.

But obviously, the current Lu clan obviously doesn't have the capital to explore this secret land, and even if they do, they can't keep such big interests.

Not to mention that the Spirit Creek is deeper, even this underground Spirit Creek itself has the level of a fourth-order spirit vein in the middle section.

Even if it was just a fourth-order spiritual vein, the current Lu family was afraid that it would not be able to hold it.

It is better to let it be buried deep underground, in the future, the Lu family will be stronger and more prosperous, and they will be qualified to develop this secret, and then consider it deeper.

However, even now, there are ways to use this underground spiritual stream.

On the way back to Yuyan Mountain, Lu Qing had already thought it through.

He has already found out the location of Lingxi underground, and he can dig a well down on the shore of the lake to connect to the underground river, and think of some way to pump water up from it.

According to his estimate, when the time comes, by pumping water next to the spirit well, even if you count the loss after the water leaves the spirit stream, it is at least equivalent to the effect of cultivating in the second-order spirit vein.

Moreover, the follow-up family has a deeper control over this spiritual stream, from its opening branch to the ground, infiltrating the lake shore of the place, and for a longer time, the family can have a real spiritual vein at a small price.

Spiritual veins are an extremely important resource for monks.

Cultivators need spiritual energy. And the conventional way to obtain spiritual energy is either to refine it between heaven and earth, or to refine it from spiritual stones.

In the case of Qi cultivators, at least one spirit stone is required for one month of cultivation, and when they reach the seventh level or above, they need two. This consumption standard is necessary to ensure that one's cultivation progress is normal, less than this number, let alone progress, it is possible for cultivation to regress.

Without cultivating with spirit stones, you can only refine the aura of heaven and earth.

It is true that the aura of heaven and earth is everywhere, but not every place is very strong. In ordinary places, the refining speed is too slow, and it can't satisfy the monk's cultivation at all.

Only the spiritual veins can support cultivation.

The so-called spiritual vein is the place where the innate spiritual energy gathers.

The first-order spiritual vein is the most common, and it is impossible to imagine that there is one barren mountain somewhere. Many small families and casual cultivators have no choice but to find a place to open up as a cave and cultivate in it.

This kind of lowest-level spiritual vein can only support the cultivation of monks in the Qi refining period at most, if the foundation building monks, if they want to maintain their cultivation, they still need to use spirit stones to fill it, at least ten a month, and more than a hundred spirit stones for cultivation alone in a year, and the time is longer, and they can't hold it at all.

Therefore, the foundation building monk had to find the second-order spiritual vein.

However, the general second-order spiritual veins can only support the cultivation of a few foundation building cultivators, and the specific ones depend on the quality of the spiritual veins themselves.

If it is exceeded, the foundation building monks will compete with each other for spiritual energy, and they will not be able to cultivate well. After reaching the upper limit of the spiritual veins that can be carried, at best, bring some other Qi cultivators, and smell some exhaust qi to practice.

When it comes to the enlightenment period, then you have to have a third-order spiritual vein.

But the spiritual vein is easy to destroy, find the pulse heart, and blow it up.

Jade Yanshan used to be a fourth-order spiritual vein, and in the battle when the Zhao clan came to the door, the core of the spiritual vein was continuously bombarded by spells in the battle, and the damage was quite large, and it was reduced to the second order, but it was still a top grade in the second order, so it could barely support the four foundation-building monks.

But cultivation is too difficult.

If Jade Yanshan wants to take a step up and rise to the third order, it must invest at least more than 50,000 spirit stones as cultivation costs.

Even if the cost of this spirit stone is calculated, the key is that it will take at least a hundred years to slowly raise it before it can be raised.

It is expensive and time-consuming.

However, often high-level cultivators must need spiritual veins, otherwise when they reach the enlightenment period, the cost of the spiritual stones required for cultivation alone will be one or two thousand. The year of Dao cultivation is not a long unit at all, and it is not uncommon for a monk to retreat for ten or twenty years at a time without coming out. If you don't have a spiritual vein, you have to spend one or two thousand spirit stones to break through the realm of a long retreat. With the value of a monk of enlightenment, he can't withstand such an expense.

For monks, spiritual veins are almost a necessity, let alone for families and sects.

Now, the Lu family is actually about to face this problem.

It was fine before Xueting built the foundation, but now, the family has four foundation building cultivators and fifty qi cultivation cultivators, which has exceeded the limit of the spiritual vein of Yuyan Mountain, and the cultivation of the family cultivators will definitely be affected to a certain extent.

Before, Lu Qing was still having a headache, but now, he found that this underground Lingxi came just in time and solved his urgent need.

"Ready to open a base!"