In fact, this is the Xuanwu Lock Spirit Array, which is the core of the entire ruin formation, and its function is naturally to transmit energy to other places, and it is also a gathering place for vitality.

If you give it a name, it can be called the Heaven and Earth Yuan Vein, which should be found by the formation master in ancient times, and only then established a sect here, using it as the source of energy for the formation.

"According to this method, it should be possible to open an entrance."

The formation book was left by the people of the September Gate, and there was naturally a lot of news about the remnant formation on it, Lu Tian imitated injecting energy into the jade pendant, and sure enough, a small hole opened behind the seat.

Without wasting time or noticing the danger, Lu Tian jumped directly into it, and then landed on a platform and went down a long staircase.

After walking dozens of meters, there are no traces of buildings around, and there are earth and stones in front of the eyes, but fortunately, the ground is extremely dry and there is no water.

However, the road did not come to an end, and it was full of tunnels that had been dug up diagonally.

Soon, the darkness disappeared, and Lu Tian also stopped descending, and came to a wider space.

It extends in all directions, supported by countless ancient stone pillars carved with patterns, tens of meters high and wide, and there are various colors of light flashing in the distance.

"This is the foundation pillar of the formation, and that side should be the Yuan Vein locked by the formation."

Lu Tian secretly guessed that the ground here was very flat, and when he walked on it, there was a sound of clattering footsteps, and a lot of dust was stepped on.

"Looking at the appearance of this dust, it should be left over from the previous when the vitality was exhausted and the formation could not function, and I don't know what the situation of the yuan vein is."

When Lu Tian crossed the hundreds of formation base pillars, he could already see the stone wall emitting colorful light in front of him, which was uneven, and he thought it was the Yuan Vein.

"It's such a complicated formation, with so many lines, how long does it take to arrange it to get it out!"

Lu Tian looked at the circle of formation patterns on the stone wall with admiration, he had already preliminarily understood a lot of formation knowledge, naturally how much effort would it take to this thing, he estimated that he would not be able to get a single formation rune now.

However, his gaze quickly moved away from the formation patterns that emitted this colorful light, and he saw the things hidden in the stones, the power stones that emitted a faint glow.

"So much, it's sent!"

Just now, he was worried that the formation consumed too much energy and could not leave any energy stones, but now this worry has long since turned into ecstasy.

"Master, this formation has the effect of actively absorbing the vitality of heaven and earth, these should have been formed in recent years."

"Formed in recent years? No wonder I just found so much dust on the ground, it seems that this formation really stopped because of lack of energy, it was only three years ago that the Heaven and Earth Yuan Qi returned, and it was only re-operational, this ancient man is really powerful, and the means of arrangement can be kept for so long. ”

Lu Tian looked at the formation patterns that dazzled him, and admiration arose spontaneously in his heart.

"You say that this formation has the effect of gathering the vitality of heaven and earth?"

"That's right, the master can tell it if you distinguish it carefully."

After hearing Xiao Qi's prompt, Lu Tian touched it, carefully observed the formation in front of him, the energy stone was already in front of him, and he couldn't run away, and this combination formation was gone after this village, so he naturally had to understand it if he had the opportunity.

Two hours later, Lu Tian shouted, "I see. ”

He had already memorized all the formations with his spiritual eye, but of course he still couldn't arrange them, after all, the realm was far behind.

"It's no wonder that the vitality of the surrounding miles is so thin, and it has been absorbed by the formation here."

"Then the energy stone I encountered in the White Wolf Cave is estimated to have been formed by the influence of this formation, maybe the formation here leaked some vitality and was formed over there."

After figuring out some of the situation, he felt that there was no need to stay any longer, so Lu Tian said directly: "Xiao Qi, can you absorb it, in order not to leave traces, I still won't dig it." ”

There were already hundreds of power stones in the Space Ring, enough for him to leave for others to use.

"Yes, there's a lot of energy here, can you absorb it all?"

"No, this formation can absorb the vitality and replenish the energy by itself, but if it is all sucked away, the formation will inevitably stop, and it will be easy to be suspected at that time."

Lu Tian vetoed the idea that there was nothing left, and communicated with Xiao Qi in his heart, "The surrounding vitality is almost absorbed, according to the replenishment speed of the vitality of other spaces, leave half a month's energy for the formation, so that there will be new vitality accumulated for half a month, and the formation will not stop, and there is also a certain amount of reserve energy to prevent someone from attacking the formation, resulting in excessive energy consumption." ”

Lu Tian already had a little bit of knowledge of the formation method and chose a better plan.

"Okay, according to the master's idea, after deducting a certain amount of handling fees, the total amount of energy that the master can get is 876755 orange energy points."

"That can reduce the refining progress of space debris by one-fifth, but unfortunately this is also the energy that the formation has gathered for more than three years, if you want to get so much, it will take two or three years, but it is also a source of energy, and you can sneak a look at it if you have the opportunity in the future."

Lu Tian was in a very good mood, the energy here had solved a lot of his problems, and it was endless, if it was used well, it could reduce his refining time by about half.

"Xiao Qi, all of them have been absorbed, and they are all used for the refining of space debris!"

"Are you sure?"

"Sure!"

This time, the total amount of energy was very large, and Xiao Qi couldn't be silent, the entire space fluctuated, and the invisible energy between the stone walls emitted white light, turning into a stream of water and injecting into Lu Tian's dantian.

The dantian also emitted light, thinking that it was accelerating the refining of the space fragments inside, and Lu Tian felt that the magnetic field around him was completely distorted, and he was affected by a very violent energy.

This state lasted for more than ten minutes, during which Lu Tian sat cross-legged on the ground, and only opened his eyes after calming down.

In addition to the formation still flashing with all kinds of light, the energy stones in the stone wall have disappeared and have completely become ordinary stones.

The accelerated refining of space debris, the further back it goes, the greater the energy consumed, and Lu Tian can only keep collecting energy to solve this constraint in a short time.

"It's not right to calculate it according to time now, and now because of the artificial joining process, it is completely impossible to accurately calculate it with time, but at present, nearly 20% of the progress has been completed, and it looks more promising."

According to the previous calculation, it would take more than five million orange energy points to completely solve this problem, and Lu Tian had gradually changed his strategy of collecting energy and focused on this kind of undamaged ruins.

The scale of this September Gate Ruins should be large, not medium-sized as they thought before, because these things that appear now alone are worth more than a medium-sized Ruins.

"You have to leave as soon as possible, it won't be long before the news spreads, this place will inevitably become a place of right and wrong, and all kinds of masters will probably come to make a profit, if I stay here any longer, it will be extremely dangerous."

After getting such a big wave of energy, Lu Tian was already very satisfied, although he was greedy, he was very witty, knowing that if he didn't stop in time, there would be no good results.

"There are two other public areas, they are going to be searched today, and then leave quickly, although those people from the Cold Moon Palace will come back in three days, they may not be fooling me."

Lu Tian got up and walked back, without any nostalgia, and at the same time, his mental power smoothed out the traces he left behind, leaving no clues for others.

After a stick of incense, Lu Tian had already come to a place more than a thousand meters away from the main hall, and looked at the arch in front of him.

"Qiancaoyuan, it should be a place to grow herbs, I don't know if two thousand years have passed, it is full of weeds or there is a thousand-year-old elixir."

Lu Tian muttered to himself, a layer of cyan light appeared on his body, and he strode in directly through the guardian formation.

As soon as he passed through the formation, it was like entering another space, and the fragrance of green grass penetrated into his nostrils, and Lu Tian's eyes lit up, because he smelled the obvious fragrance of medicinal herbs, and it was a particularly strong one.

"I'll go, it's not the same situation I expected!"

The medicine garden is separated by a stone wall several feet high, and the formation can also isolate spiritual power, and Lu Tian can only see the situation inside when he walks in.

The area is not large, this is about ten acres, but the plants inside are very lush, the fog is filled, and the aura is abundant, which is completely another small world.

His previous guess was that this medicine garden was not taken care of, it should be that the plants were scarce, the weeds were the majority, and if he was lucky, there were some thousand-year-old elixirs left.

But this look, as if someone is taking care of this medicine garden, he didn't touch a single weed at all, even the flowers in front of him were full of aura.

The medicine garden is square, four spirit trees more than ten meters high grow in the corner, three of them are still hanging with various spirit fruits, and in the middle are all kinds of spirit grasses, just next to the feet Lu Tian found a few thousand-year-old ginseng, and other messy elixirs, you have to carefully identify, after all, these are all varieties left by ancient times.

Lu Tianxia subconsciously touched his eyes and used his mental power to identify it, it was really not an illusion.

"Xiao Qi, is it really true?"

He still didn't believe it, the elixir spirit plant here was too abnormal, so he didn't even step into the true scope of the medicine garden at all.

"Master, it's true."

"Impossible, this ruin is obviously empty, how can this medicine garden be taken care of so well."

Saying that, he had a chill down his spine, could it be that there was some old thing still hiding here?

"It's not artificial."

"It's not artificial, is it because they grow honestly like this?"

According to the places that Lu Tian searched, the September Gate of that year did take away most of the valuable things, then the medicinal materials in this medicine garden must have been harvested almost completely, and what Fang left here back then should be some small seedlings or medicinal materials that were too shallow, and in the case of no one taking care of them, they must have grown indiscriminately, and the current situation is obviously not in harmony.

"Master, there are no people, it doesn't mean that animals can't do it, there are spirit beasts in this medicine garden, and it is because of them that these medicinal materials have become like this."