Spirit summons? I want to do it myself!

Since it was decided to start the exploration from the middle of the river, Lido no longer delayed.

In order not to disturb Fu Mei's practice, Li Duo dug another ice hole about 30 meters away. It was not big, only 30 centimeters square. She then probed the spiritual thread into it and then dispersed it.

Such trouble is only to reduce the consumption of spiritual thread passing through the ice layer.

Liduo controlled the range of the spiritual thread to about 30 square meters, which was a circle with a radius of about three meters, and then began to slowly penetrate into the soil below the riverbed.

At first, it was the mud at the bottom of the river, which was about three meters deep. It was covered with water plants, and occasionally there were some finer gravel and pebbles scattered among them.

It can be seen from this that the flow rate of the river in this section of the river is relatively slow. Lido remembers that in the sharp bend downstream and the area where the river flows faster, the riverbed sediments are mainly coarse river sand and pebbles.

Due to the high content of water, it is not difficult for the spiritual thread to pass through this part.

Below the silt is the sedimentary rock that has accumulated over thousands of years in the Talc River. The humidity gradually decreases as you go down, and the density is much higher than the silt, making it more difficult for the spiritual thread to pass through.

Lido's spiritual thread went down to a depth of about 500 meters below the riverbed and was no longer able to go down. It seemed that this was the current limit of Lido's spiritual power's downward detection.

Since she couldn't go any further down, Lido could only shift the detection range, hoping to find something within 500 meters.

It should be easiest to find something in the middle of the river, but strangely, Lido spent an entire night exploring the entire river within 500 meters below the riverbed. Her mental energy was almost exhausted, but she didn't find anything strange.

What went wrong? Unfortunately, this is all I can do tonight. I have to go back to the academy for check-in. I'll come back tomorrow night.

The next night, Lido came here again after resting and eating enough.

As usual, after finding a good place for Fumei to practice, Liduo stood by the river and fell into deep thought.

After two surveys, one above the riverbed and one below, there shouldn't be any mistakes. What was overlooked?

From a spatial perspective, there shouldn't be any places that are missed, right? This is a mental detection, not naked eye observation, and there is no time to blink.

In this case, we can only do it again! However, this time, Liduo's focus is no longer on whether there are any abnormalities in the river water, but on the changes in the concentration of water magic elements in the river water.

Lido vowed to find the point in this section of the river where the concentration of water magic elements was the highest!

If she still finds nothing after finding that point, Lido can only think that the secrets here are temporarily out of her reach, and simply treat this place as a free open-air training room!

Ah! Another big project! This time, we have to go slower and feel carefully! We don’t have to think about where to start, just sense from the downstream end to the upstream end.

Lido doesn't want to go through this again!

Another night passed. This time, Lido only explored less than half of the entire river. Lido marked the location and returned to the academy.

So that night, Lido continued to sense and detect from the marked point, and detected a position close to the other end point upstream, and then had to return to the dormitory.

In fact, the detection can be considered complete after this point, because Liduo has basically determined the area with the highest concentration of water magic elements in the river.

But just in case, Li Duo still marked this location and waited until tomorrow night to sense the remaining area again. Although Li Duo thought there would be no gain.

As expected, the next night Lido did not find anything unusual in the remaining area.

Similarly, the area with the highest concentration of water magic elements was not unexpected to Lido. It was right in the middle of the river, which was the place where Lido thought it was most likely to discover something at the beginning!

So, Liduo's conclusion was proven to be correct at the beginning! So what caused the result to be unsatisfactory? !

Lido believes that a reasonable explanation can be found in this area!

Therefore, this time, Lido used a more mentally demanding method of scanning, carefully sensing the area with the highest concentration of water magic elements, from the ice on the river surface to below the riverbed, from top to bottom, millimeter by millimeter.

Finally! Hard work pays off! Lido found the source of those water magic elements!

It's a spring! A small spring! Hidden among a pile of rocks near the other side of the river! If you don't look carefully, it's easy to miss it!

The spring water coming out of the spring can almost be regarded as a high-purity water magic element solution! The concentration of magic elements in the elementary water training room of the academy is many times higher!

And the area that Lido previously thought had the highest concentration of water magic elements was just the initial dilution of the spring water coming out of the spring!

Although thanks to the thick layer of ice on the river surface during the snowy season, the concentration of water magic elements in the river water here is slightly higher than that in the primary water training room, but the water from such a small spring is diluted into such a wide river that keeps flowing and can still reach such a concentration, which shows how high its purity is!

There is no doubt about it! The secret is in this spring! In this spring water!

Lido probed her spiritual thread into the spring, intending to trace the source of the water magic element along the spring water.

Of course, due to the high concentration of magic elements in the spring water and the countercurrent, it was very difficult for Lido's spiritual thread to move forward.

Fortunately, after many resonances and fusions, Lido's mental power had an energy level slightly higher than that of magic elements. She had also witnessed the turbulent energy vortex in the spiritual stone, so although it was difficult, she still stubbornly moved forward.

The spiritual thread first moved diagonally downward for about five meters, and then it felt like it had left the river channel and entered the underground on the other side of the river.

So that's it! It turns out that the source of those water magic elements is not in the river, but underground on the other side of the river!

No wonder Lido plowed the river from top to bottom with her mental power but couldn't find anything!

Soon, Lido's spiritual thread reached its limit along the path of the spring water.

Lido had no choice but to call Fumei back to the elf position, and used her lightness skills to jump to the other side of the river, sensing the location of the end of her spiritual thread.

Fortunately, the spring water channel was only five or six meters underground. Lido successfully used the mental thread to find the spring water channel from the ground downwards and completed the mental thread relay.

After repeating this process three times and passing through the spiritual thread relay, Lido finally arrived at the end of the journey - a mountain that was neither too big nor too small, neither too high nor too low, with a sinkhole on the top.

The source of the spring water is in the belly of the mountain. If it was difficult for Liduo's spirit to go upstream in the spring water, then when it came to the source of the spring water, there was no chance at all!

Because in Lido's mental perception, a huge energy ball appeared, and its energy level was far higher than any energy particle Lido had ever perceived before!

Its energy density is many times greater than the psychic stone that Lido had sensed before!

This energy ball is still radiating energy outwards. Presumably, this radiated energy is the water magic element!

Because this energy ball seems to be embedded in the belly of the mountain, but this place happens to be located at the intersection of underground waterways, so this energy ball is actually soaked in water. Perhaps this is why it radiates water magic elements outward.

In the face of such energy intensity, Lido's mental strength is not enough.

The concentration of magical elements in the water outside is only slightly higher than that in the spring water, so Lido can barely get close.

But near the largest energy ball, Liduo's mental power could not get close! It collapsed as soon as it got close!

What is this energy ball?! Where does it come from? How can it radiate water magic elements outward?

Many mysteries linger in Lido's mind, and Lido can only guess secretly.

Could this be the legendary magic crystal mine? !

But it seemed to be quite different from the legend. Moreover, although the energy was huge in Lido's perception, it seemed a bit far from the level of magic crystal mine.

And in terms of size, isn't it too small? The location is also very subtle, is this really a magic crystal mine?

In other words, is the origin of magic crystal mines as understood by people on the magic continent really correct?