These spirit crystals, formed over thousands of years, are naturally thunder crystals.

A thunder crystal is worth hundreds of times more than an ordinary spirit crystal.

Moreover, in the thunder crystal, not only is the spiritual power abundant, but the most important thing is that after mixing the power of the Heavenly Thunder Tribulation, these spiritual qi have also mutated and become a completely different power, for cultivators, if they get a drop, they will benefit immensely.

Therefore, thousands of years ago, Lei Jing was gradually discovered by humans, and then, the monks on the thirty-six continents began to frantically pour into the primordial continent to find Lei Jing.

Until now, in the vast primeval continent, the places that the monks can reach are still only a small part.

After any monk reaches the Mahayana realm, the speed of cultivation will become slower and slower, or even stagnant, and no matter how powerful the spiritual mansion is, it will not be able to break this shackle.

And only Lei Jing can break free from this shackle and quickly improve the cultivation of Mahayana monks.

Lin Yi and Hongyan finally rushed into the robbery pit, and above the robbery pit, there were dozens of guards.

These guards are naturally guarding the entire robbery pit, and they are also to collect taxes for the Six Palaces.

The pit is huge, and there are a large number of cracks and stone caves in the pit from top to bottom, so the scope of search is even broader.

Hundreds of monks rushed into the pit, and in the blink of an eye, not a single figure could be seen, and they all burrowed into those cracks and stone caves.

"Lin Yi, you remember, Lei Jing is very different from ordinary spirit crystals, they are bigger, and obvious lightning can be seen in the crystal!" Hongyan said softly, "Moreover, Lei Jing is very fragile, so if you find it, you must pinch it carefully, otherwise it will explode!"

Lin Yi nodded, "Got it!"

"Let's go, let's split up!" said him, and the red smoke had already rushed into a bottomless stone cave.

Lin Yi looked around, and then entered a crack.

This fissure, apparently naturally formed, extends a great distance, and can even connect to another pit in the distance.

It seems that the catastrophe that occurred 10,000 years ago was indeed devastating, and it can be seen from the trauma of these pits.

"Little head, you like to eat spirit crystals so much, it just comes in handy!"

After entering the crack, Lin Yi released the little head, he knew that the little head was very sensitive to the induction of the spirit crystal, but he didn't know if it had any effect on the thunder crystal!

The little head was suspended in mid-air, stretched out its nose, sniffed around, and was also dazed, and didn't seem to feel any breath.

Lin Yi touched the body of the little head, and then flew forward, "Then let's find it together!"

Since the little head didn't sense it, Lin Yi could only probe carefully in the cracks, refusing to let go of every stone, and the speed of natural flight was much slower.

After half an hour like this, Lin Yi found nothing, only a few ordinary spirit crystals.

Suddenly, the little head "squeaked", and the eyes lit up, as if they had finally made a discovery.

Immediately, the little head shook his buttocks, and he rushed forward, as fast as electricity.

Lin Yi hurriedly followed.

In the crack, the little head found a hidden stone cave and plunged into it.

The stone cave was very large, and Lin Yi quickly flew in, and his body was just right to stand up in the stone cave.

In the blink of an eye, the little head had already flown a distance of several hundred meters.

In the stone cave, there were twists and turns, Lin Yi followed the little head, and he didn't know how far he flew, except for the stone in front of him, it was a stone.

At this moment, the little head suddenly stopped, landed on the stone wall next to it, and screamed in his mouth.

Lin Yi looked at it, but on the stone wall, there was a strange luster, and the aura was compelling.

Sensing it carefully, Lin Yi could feel that there was a very strange aura leaking out of the stone wall.

The little head waved its two paws, pounced on it, opened its mouth and bitten, biting off a large piece of stone.

Lin Yi immediately took out the Sun Swallowing Sword and slashed it out, sword after sword, slashing on the stone wall.

The stone inside is indeed very hard, even if the Sun Devouring Sword is a heavenly weapon, it can only split a crack half a meter deep.

With Lin Yi's sword splitting and the bite of his little head, he finally broke through the thick stone wall, and then, the light became stronger.

Lin Yi took a closer look, but behind the stone wall, there was a large piece of spirit crystal, radiating a star-like light.

"Just an ordinary spirit crystal?" Lin Yi was slightly disappointed.

However, it is better than not getting anything.

Lin Yi stretched out his hands and broke open the stone wall next to him, and then grabbed those spirit crystals and put them into the ring.

At this time, Lin Yi finished collecting these spirit crystals, but he found a dazzling light that was transmitted from behind.

Gently moving away from the spirit crystal next to him, Lin Yi saw a fist-sized strange spirit crystal, glowing with a strong light, and the size was much larger than an ordinary spirit crystal.

Lin Yi stretched out his hand and took this spirit crystal in his hand, which was very heavy, at least thousands of catties.

A fist-sized spirit crystal actually weighs thousands of catties, which is indeed incredible.

Then, Lin Yi saw that a tiny lightning bolt actually flashed in the crystal of the spirit crystal, although it was very weak, it was captured by Lin Yi.

Lin Yi's eyes suddenly lit up, "Could it be that this is ...... Lei Jing!"

Lin Yi immediately became excited, hurriedly put this thunder crystal into the ring, and then continued to crawl inside.

Sure enough, behind those ordinary spirit crystals, there were many thunder crystals, one after another, as if they were arranged, very neat, and the light gathered together, very dazzling.

The power in the thunder crystal is very strong, but also very fragile, and even if you accidentally collide, it may explode.

The power of Lei Jing's explosion is a threat even to monks in the Mahayana realm.

If it was a monk in the Xuanfu realm and below, if he encountered the explosion of the thunder crystal, there was almost no chance of survival.

Therefore, Lin Yi was very careful, took out the Lei Jing one by one, and then sent it into the ring.

In the end, Lin Yi obtained twenty thunder crystals, as well as some negligible ordinary spirit crystals.

Twenty pieces of thunder crystal, taking it out is definitely an astonishing amount, you know, most of the monks in the tribe, a busy day may not be able to find a piece of thunder crystal, if you are lucky, you can find one or two, you are satisfied.

If you can find five pieces at once, it is a stroke of luck.

And when Lin Yi first arrived, he directly found twenty thunder crystals, which was enough to envy everyone to death.

Of course, it's all the work of the little head.

Within a certain range, the little head can sense the existence of all spirit crystals, which is very sensitive.

And the little head also likes this Lei Jing very much.

After entering the ring, the little head rushed towards those thunder crystals as if he was hungry.

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