Back in his room, Kun Yu activated the water curtain and used energy to make an alarm device on the water curtain, and then carefully opened the metal box.

With little knowledge of chemistry, Kun Yu can probably tell that this metal box is made of copper alloy, and as for why he knows, the patina clinging to the surface of the metal is the best proof.

After rummaging and researching, Kun Yu determined that this metal box was definitely not something here.

Kun Yu found a less obvious solder joint at the interface of the box, how could there be a high-temperature solder joint at the bottom of the river where even the fire could not ignite?

After looking around and not finding an obvious sign, Kun Yu put the box aside, and if he wanted to explore the secret of the box, he would only go to the treasure hunt tomorrow to see.

I struggled to pull out the contents of the box, which was much heavier than I expected.

The dark yellow surface, in the shape of a water droplet, is properly an amber.

Seeing this amber, Kun Yu remembered that he was in a wild and primitive world, there should be a lot of this kind of amber, why didn't he see it until today?

The amber turned over, and the back was flat, which shows that the amber fell directly to the ground when it landed, and did not fall naturally into the water.

Lying on the amber, Kun Yu looked in with great effort, and in the haze, a small insect with wings was spreading its wings and wanted to fly.

Bright rays of light circulate beneath the dull yellow epidermis, and these rays seem to circulate themselves in the dull yellow amber.

Without knowing what the little bug inside was, Kun Yu would not easily break the amber, as for why the amber that should have been on land was finally found at the bottom of the river.

There are too many possibilities for this, and Kun Yu doesn't plan to explore it.

Placing the amber back in the box, Kun Yu placed the box in the alcove on the wall and made an energy mark as a precaution.

The night passed, and the noise on the lava stone pillars never stopped, day and night.

After a good night's sleep, Kun Yu was refreshed, and he habitually looked at the mark on the water curtain door, and it was very good that it was not destroyed.

Putting the rattan bag on his body, Kun Yu loaded dozens of energy coins and went out.

I'm going to go to the treasure hunt realm today, and as for which one to go to, I'll talk about it when I arrive.

A loud chirp was heard, and the river turtle appeared at the ferry on time.

Threw a piece of energy coin to the coachman, Kun Yu got on the back of the turtle, I don't know if it's an illusion, today's coachman seems to give him a little different.

The river turtle set off smoothly and headed towards the crack with a passenger on its back.

There was another rapid fall, and it landed steadily in front of the bazaar.

Following the large army towards the depths of the bazaar, Kun Yu did not stay any longer.

Passing by the mouse's stall, it's a pity that I didn't see a mouse, otherwise I should still be able to ask something.

Soon, the large force stopped.

Looking up, a doorway appeared in front of me, and the creatures at the front had already begun to pay to enter.

The speed of the march was fast, and Kun Yu didn't wait long before appearing in front of the doorway.

The door hole was so deep that you couldn't see the inside from the outside, so I learned that someone else threw two energy coins to the doorman who was guarding aside.

The doorman lazily took the energy coin and didn't look at it.

Here, no creature dares to evade the ticket, this is the rule set by the emperor, whoever dares to evade the ticket unless it disappears forever, as long as it appears, the king-level creature will come and kill it in person.

There are no creatures here who dare to provoke, and the doorman on duty here represents Emperor Ying.

Swimming forward, Kun Yu entered the dark doorway.

Thinking that he needed to swim for a long time, who knew that Kun Yu would come out of the darkness of the doorway without a breath.

What catches your eye is three wide curtains of water.

The water curtain falls vertically from a very high place, and there are creatures constantly coming and going back and forth in the three water curtains, which are extremely busy.

Next to the water curtain are three stone tablets with figures carved on them.

From left to right is a drop of water, a rock, and a sharp object.

I think the leftmost one is the Water Source Realm, the middle one is the Grotto Realm, and as for what the far right is, Kun Yu hasn't inquired yet.

Kun Yu had thought about it before he came, and the only purpose of his coming today was to find out the secrets of those metal boxes.

I looked around and swam towards the grotto.

Through the curtain of water, the eyes were replaced by a gray color.

The grotto realm, said to be a grotto, is actually more like a stone mountain.

The stone mountain is so big that Kun Yu can't see the top of the mountain when he stands at the foot of the mountain and looks up.

The surface of the rocky mountain is inhabited by many creatures, and all kinds of light flickered on the mountain.

These creatures are here to mine, and if you find a stone with energy in the mountains, the price will be worth it.

No one cares about Kun Yu's entry, the Grotto Realm is a treasure hunting realm with the largest number of entries and exits every day, there is almost no threat to the periphery here, and the output is relatively considerable.

Those who come into the grotto realm are all rushing to make a small profit and leave, which belongs to stable output and dead wages.

Swimming along the carved out mountain road, there are all kinds of potholes of all sizes, the small ones are only the size of a fist, and the big ones can fit a Kunyu.

The busy scene made Kun Yu wonder if he had entered the black mine.

The mouse explained that the metal box was at the entrance of the second layer of the mountain wall, and if you entered from this hole, you could enter the interior of the grotto realm, but it was also the shallowest layer.

The metal boxes are piled up on this level.

You don't need to look for it, a huge hole appeared in front of Kun Yu in a daze, and you can't see it or not.

After trying it at the entrance of the cave, there was no sense of danger, and Kun Yu cautiously swam inside.

The hole is not very deep, Kun Yu didn't go far, and suddenly there was a big hole in front of him, and a lot of holes appeared in front of him, and all kinds of things were densely piled up under the pit, like a garbage dump.

Beyond the pothole, there is another hole on the opposite side, which should be the entrance to a deeper level.

Although the grotto realm is the least dangerous of the three treasure hunting realms, it does not mean that there is no danger, many of the people who come out of the innermost layer are injured, and there is even a phenomenon of attrition.

Without thinking about going inside, Kun Yu fell towards the hole, and on it he had already seen a metal box.

Sure enough, this is where the metal boxes are hoarded.

The closer he got to the bottom of the pit, the more shocked Kun Yu became.

It's a garbage dump here, it's a grave mound.

A large number of biological limbs were mixed between various objects, and blood of various colors was scattered at will, staining everywhere, and the water could not wash it away.

Some of the stumps still have energy on them, and they look like they just died not long ago, but they don't know why they are here.

Kun Yu flicked his tail, swept the stump away, and pulled out a metal box.

The box was too rusted to look at, and the patina corroded interface was completely broken.

If you look at it, there's no value in researching.

Dropping the box, Kun Yu continued to swim forward, and soon a stone with energy caught his attention.

The stone itself does not carry energy, and the weak energy is emitted from the lines on the stone.

The stone was very broken, and the signs of fracture were evident from being forcibly torn apart.

There is only one line, but there is still an energy overflow.

Just as he was about to throw it away, after thinking about it, Kun Yu still put the stone in his pocket.