In the cold and dark seabed, all kinds of strangely shaped deep-sea fish swim leisurely, and these deep-sea fish, which are usually completely invisible on the shallow water, appear in schools in the depths of the seabed.

Suddenly, schools of deep-sea monsters spread out in all directions. A two-meter-diameter circular air shield was sinking rapidly, alarming the schools of deep-sea fish.

After a period of adaptation, Lin Fan's eyes can see clearly in the dark depths of the seabed, and the magic of the seabed makes Lin Fan feel the infinite magic and mystery of nature, and Lin Fan has opened his eyes to these various deep-sea fish people who have never seen before!

Moreover, as a cultivator, Lin Fan felt that the concentration of heaven and earth aura at the bottom of the sea was more than ten times richer than that on the ground, and if he could cultivate at the bottom of the sea for a period of time, he would definitely make rapid progress!

However, this is just an extravagant hope!

The deeper you go to the bottom of the sea, the higher the concentration of aura, but at the same time, the pressure in the depths of the seabed is also greater!

A cultivator like Lin Fan who is building a foundation realm, the strength of his physical body is not high, although his body has been greatly strengthened after entering the foundation building realm, he can only dive to a depth of about a thousand meters under the sea without relying on any equipment!

And at a depth of thousands of meters in the deep sea like now, the water pressure on the bottom of the sea alone at this time is enough to squeeze Lin Fan into a piece of meat!

Feeling the rich aura of heaven and earth at the bottom of the deep sea, Lin Fan couldn't care about anything anymore, and began to sit down cross-legged and enter the cultivation state.

While Lin Fan was running the Hongmeng Refining Technique with all his strength to cultivate, he controlled some True Qi to be distributed on the surface of his body, resisting the colder and colder cold of the deep sea.

I don't know how long it took, Lin Fan retreated from his cultivation state, and when he opened his eyes, he found himself in an underground cave, and the qi shield that originally protected him had also disappeared.

However, now in the underground cavern, it doesn't matter if there is that air shield protection or not.

On the rock wall of the underground cave was some unknown plant growing in front of Lin Fan's eyes, and these plants emitted a faint white light, clearly presenting everything in the cave in front of Lin Fan's eyes.

The top of the cave is covered with sharp stalactites, and there are constantly stone milks condensing in the sharp parts of the lower end of the stalactites, but the speed of condensation is very slow, and it takes most of the day to condense and drop drops.

When the stone milk drops to the bottom of the cave, because of the accumulation of time, many strange-shaped stalagmites are formed on the ground of the cave, and these stalagmites are refracted in colorful colors under the reflection of the glowing white light emitted by the glowing plants on the rock wall, which makes people feel like they are in a dream!

Lin Fan looked around the cave and found that the space of this cave was very huge, and it was estimated that it could fit a football field!

This cave is supposed to be a cave hidden in an undersea mountain range!

Lin Fan estimated that when he was cultivating, he was unknowingly sent to the entrance of the submarine cave by the undercurrent of the deep sea, and then to the interior of the cave by the surging current at the entrance.

Take things as they come!

Lin Fan began to look for a way out in the cave, and there were usually one or two passages leading to other places in a submarine cave like this.

Although the submarine cave was huge, it was not yet as large as it was boundless, and Lin Fan soon found a passage to another place in one part of the cave.

There were no glowing plants growing on the rock walls in the passage, and it was pitch black, but Lin Fan's eyes were already able to see in the dark at this time, and it didn't have much effect.

Walking along the passage, I don't know how long it took, but the passage was still not finished. However, Lin Fan found that as he went deeper into the passage, the concentration of the surrounding heaven and earth aura increased!

There's a treasure ahead!

This was Lin Fan's first thought after discovering the change in the concentration of aura. Generally speaking, the higher the concentration of aura in heaven and earth, the higher the probability of treasure appearing! In a place like now, where the concentration of aura is dozens of times higher than that of the outside world, the probability of treasure appearing is extremely high!

Lin Fan's speed of progress gradually increased, and it didn't take long for a little light to appear in front of him, and as the distance got closer and closer, the light became bigger and bigger!

Finally, when the bright light expanded to two meters in size, Lin Fan felt that he had rushed out of the passage and entered another space, and the concentration of heaven and earth aura in this space had reached more than a hundred times the concentration of the outside world!

The dazzling white light in the space made Lin Fan, who had been in the dark passage for a long time, feel a burst of discomfort, and hurriedly closed his eyes, and slowly opened them after a while.

After adapting to the light in the space, Lin Fan finally saw the situation in the space clearly.

A space the size of a room, the walls on both sides of the passage exit are ordinary rock walls, but the wall opposite the passage exit is covered with shiny crystals, and those bright lights are emitted from these crystals!

Spirit Crystal!

This was Lin Fan's first thought!

Spirit Crystal Vein!!

This is Lin Fan's second thought!!

Got rich!!

This was Lin Fan's third thought!!

After being stunned for a moment, Lin Fan immediately threw himself on the opposite wall and dug down a piece of the nearest spirit crystal and received it into the Hongmeng Ring.

Although there were no such things as heaven and earth treasures in this space, the discovery of a spirit crystal vein made Lin Fan feel even more excited!

Although the treasure is a good thing, I don't know if it is suitable for my current use. In case the effect of the heavenly treasure obtained is too powerful, even if you get one and don't get it!

However, the Spirit Crystal Vein is different!

Spirit crystal, as the name suggests, is a mineral formed after the high condensation of the aura between heaven and earth, which contains a large amount of heaven and earth aura. Therefore, the effect of cultivating with spirit crystals is several times better than the effect of cultivating with spirit gathering arrays!

And the most important thing is that the spirit crystal is different from the heavenly material and earth treasure, some heavenly material and earth treasure have strict requirements for the user, for example, after the person who cannot reach a certain level of cultivation takes the heavenly material and earth treasure that contains powerful energy, not only can not get benefits from it, but because he can't bear the energy of the heavenly material and earth treasure and explodes to death!

But the spirit crystal is different, because the spirit crystal is formed by the high condensation of the aura of heaven and earth, and in the final analysis, its essence is still the aura of heaven and earth, so the spirit crystal is suitable for people at any stage of cultivation!

After frantically digging the spirit crystal for a while, Lin Fan woke up from that crazy state. Thinking of the crazy state he was in just now, Lin Fan couldn't help but feel embarrassed.

However, who can blame this? Who made the heaven and earth aura of Shijie so thin today, and the difficulty of cultivation was thousands of times more difficult than in ancient times!

Anyone who discovers a spirit crystal vein like himself under such circumstances will probably fall into a state of madness like himself!

Not to mention a vein of spirit crystals, Lin Fan estimated that the appearance of a piece of spirit crystal in the world would attract the competition of countless cultivators!

Speaking of which, this spirit crystal vein is still a rich mine. Although Lin Fan's divine consciousness that could scan everything within a radius of three hundred meters on the ground could only scan a range of one hundred meters in the land, and the range of the scans was reduced to one-third, it was within this hundred meters that Lin Fan's divine sense found thousands of spirit crystals!

After digging the spirit crystal vein for half a day, Lin Fan had already dug out a cave three or four meters deep on the rock wall, and at this time, Lin Fan's Hongmeng Ring had already stored hundreds of spirit crystals!

Suddenly, Lin Fan stopped mining and returned to the space outside the cave and sat cross-legged.

Just when he was digging the spirit crystal, Lin Fan suddenly felt a surge of true qi in his body, and there were faint signs of breaking through the foundation building realm and entering the spirit silence realm. In order not to let the opportunity for a breakthrough disappear, Lin Fan immediately stopped mining and came to the outside space to cultivate and break through!

The Hongmeng Divine Refining Technique was running at a high speed that could not be achieved before, and the rich heaven and earth aura in the air turned into a pillar of aura that fell from the top of Lin Fan's head like a Daigo empowerment, and a large amount of heaven and earth aura was absorbed into Lin Fan's body, and it was quickly refined into true qi!

Time is like flowing water, and a large amount of heaven and earth aura is poured into Lin Fan's body from the top of Lin Fan's head, and the momentum on Lin Fan's body is also constantly improving.

Waves of rich spiritual qi washed over Lin Fan's body, washing away the impurities hidden in the deepest part of Lin Fan's body and the most difficult to remove little by little!

Unconsciously, Lin Fan's bones became white and transparent, exuding a burst of white light, and his skin became more and more fair, at this time, Lin Fan said that it was snow-skinned jade bones!

The sound of Dao Dao thunder came from Lin Fan's body, resounding throughout the underground space. Accompanied by the sound of thunder, bursts of strange fluctuations surged in Lin Fan's body, and those impurities that had been deposited in Lin Fan's body for many years and had been deeply rooted were dispersed, and then washed out of the body by waves of spiritual air!

After three hundred and sixty thunderous sounds, the deep-rooted impurities that had been deposited in Lin Fan's body for many years were completely washed out of his body, and Lin Fan's whole person at this time was like the purest and most flawless crystal, and he couldn't see a single flaw!

When all the impurities were cleaned up, Lin Fan felt a shock in his body, and a powerful energy surged from the depths of his body, breaking through the shackles of cultivation and reaching the peak of the early stage of the Spiritual Silence Realm in one fell swoop!

After the breakthrough of cultivation, the aura that frantically poured into Lin Fan's body stopped pouring in, but Lin Fan did not stop cultivating, but ran the cultivation exercises over and over again, familiarizing himself with the liliang that had increased greatly after breaking through the shackles of cultivation.

In this way, for a long time after that, Lin Fan cultivated while digging the spirit crystals in the spirit crystal veins. Fortunately, Lin Fan is a cultivator, and he can rely on converting spiritual energy into energy to sustain life after breaking through the foundation, and he doesn't need to eat to maintain his life, otherwise Lin Fan will starve to death in the cave!

The spirit crystal vein that Lin Fan discovered could only be regarded as a small spirit crystal vein, and when Lin Fan dug to a depth of more than three hundred meters, he did not find a spirit crystal.

However, this small spirit crystal vein can also be regarded as a rich ore among small spirit crystal veins. From this vein of spirit crystals, Lin Fan dug up hundreds of high-grade spirit crystals, nearly 10,000 middle-grade spirit crystals, and thousands of low-grade spirit crystals.

With these spirit crystals, it was enough for Lin Fan to cultivate for a long time.

Time passed imperceptibly in the mining, and Lin Fan's cultivation was slowly improving. When Lin Fan dug out all the spirit crystals in the spirit crystal vein, Lin Fan's cultivation had unknowingly broken through to the peak of the middle stage of the Spirit Silence Realm!