From the lake, the scenery of Daxia Lake can be said to be beautiful, and under the lake, Xia Qi feels like he is in another beautiful world with aqua blue color.

Of course, at this time, he did not immerse himself in the beautiful scenery in the water and forgot to do the important matter. His attention quickly shifted to the lizard soldier equipped with a harpoon gun.

They did not dive too deep. Even in this sunny weather, once they dive too deep, the visibility underwater will begin to plummet, and finally they cannot see their fingers. After all, the depth that the sun can shine under the lake is limited.

For this purpose, the test of the harpoon gun is enough at an appropriate depth.

It can be seen that for this experiment, the people from the Ordnance Research Department had already made some simple arrangements at the bottom of the lake in advance.

It can be seen that in the lake, there are two targets, one near and one far, floating there in a special way.

After diving to a certain depth, the lizard soldier turned his head and looked towards Xia Qi.

In this regard, Xia Qi signaled the other party to start the experiment.

The experiment of the harpoon gun officially began at this moment.

The lizard soldier had already been familiar with the entire operation in advance. He skillfully unscrewed the equipped gas cylinder and filled a special harpoon into the barrel.

Then, he picked up the large harpoon gun. After aiming, the trigger was pulled, accompanied by a burst of bubbles, and the special harpoon that flew out directly shot towards the target with a water flow.

Because it was in the water, during the whole process, Xia Qi could be said to have seen the trajectory of the harpoon gun clearly, with a different kind of beauty.

At the same time, the attack principle of the entire weapon is indeed the same as Xia Qi expected.

The principle of launching a general thermal weapon is to propel and fire according to the high-pressure gas generated by the rapid combustion of gunpowder, while the harpoon gun is more straightforward, which is to propel the gas in the high-pressure gas cylinder.

This is also the main reason why harpoon guns can be used underwater.

And just as Xia Qi was thinking this, the harpoon that flew out had hit the target in the distance.

Although the target is not small, it still shows considerable accuracy when it can hit.

Afterwards, while the lizard soldier filled the harpoon gun again, another lizard man swam quickly to the target and picked up the target.

It was not until the target was sent to him that Xia Qi finally saw clearly that the wooden target, which was almost five centimeters thick, was directly penetrated by the harpoon!

But Xia Qi felt a little strange, because the attack from the Harpoon gun just now did not trigger the spell spell on the gun at all!

Sure enough, after completing the filling of the second harpoon, the lizard soldier turned around and asked Xia Qi for instructions. The target that was placed further away was obviously prepared for the next spell attack!

After getting Xia Qi's permission, the water-blue magic crystal began to flash on the harpoon gun that was picked up again. Then, the entire circle of mysterious spells around the water-system magic crystal lit up.

The next second, the harpoon that flew out directly shocked Xia Qi.

So fast!

The moment the harpoon broke out, the speed was astonishingly fast. The water flow that was supposed to have formed resistance seemed to have become the help of the harpoon at this moment.

In just a blink of an eye, the flying harpoon hit the target further away.

There is no need to confirm the power. The firing rate alone, coupled with the visually measured attack range of more than 300 meters, is enough to surprise Xia Qizu.

It is worthy of being a magic weapon, and its performance is really nothing. According to the rate of fire and range, as long as you launch an attack while aiming at the target, ordinary fishmen may not have time to react at all and will not be shot obediently?

The lizardman underwater was just like before, and soon picked up the target.

There is no doubt that the harpoon runs through the target again.

However, Xia Qi soon discovered a problem, and the thickness of the target seemed to have become thinner...

Then, Xia Qi, who seemed to realize something, quickly signaled everyone to return to the shore.

After taking the target and conducting secondary confirmation, he found that the thickness of the target was indeed not as good as the previous one. If the previous one was more than five centimeters, then the thickness of this target should be visually only three centimeters.

However, this target is metal.

Before Xia Qi could say anything, Xia Fox, who also returned to the shore, had already taken another harpoon with excitement.

Seeing Xia Qi's eyelids twitched slightly when he saw that harpoon, he had a premonition in his heart.

"Enhanced version?"

Although Xia Qi did not see that this harpoon was different from the harpoon used before, according to Xia Fox's personality, if it was the same thing, she would not be so excited.

So, the answer that Xia Qi could think of was that this harpoon must be an improved and enhanced version.

Sure enough, Xia Fox, who heard this, nodded vigorously.

"Spirit Weapon?"

Xia Fox nodded again.

Good guy, Xia Qi reached out and picked up the spell harpoon. I wonder if it was his illusion. The weight of this spell harpoon seemed to be lighter than the ordinary harpoon before.

At the same time, after a while, Xia Qi, who had not found the spell, couldn't help but feel even more confused.

"Why didn't you see the spell?"

"hey-hey."

Xia Fox heard this and let out a smug laugh.

"Your Majesty, this magic harpoon has two layers of shaft."

"The spell pattern is engraved on the inside? But why do you need to make it into two layers and directly engraved on the outside? In this way, the productivity can be further improved, or is it designed like this because of any special effects?"

In response to this, Xia Fox smiled again and said, "Your Majesty, the materials of these two layers of structure are actually different."

After hearing this, Xia Qi had some guesses in his heart, then raised his hand and signaled Xia Fox to continue talking.

"The outer layer is made of alloy, but the inner layer of "core" is made of elves' spiritual wood."

When Xia Qi heard this, a trace of clarity suddenly flashed in his eyes.

"So that's it. No wonder I think the weight of this spell harpoon seems to be lighter than the ordinary harpoons before. It turns out that's why."

But at the same time, Xia Qi, who learned this answer, inevitably had another doubt.

"But, if you do this, it should have an impact on the strength and power of the harpoon, right?"

Perhaps he had guessed Xia Qihui's question a long time ago, and Xia Fox said again: "Theoretically speaking, this is true, but this harpoon is blessed by magic power. Therefore, even if the strength of itself decreases, the harpoon that receives the blessing of magic power is still far stronger than the ordinary harpoon."

"However, there are also disadvantages. Unlike ordinary harpoons that can be reused as long as they are recycled, this kind of spell harpoon will be exhausted after an attack is launched. At the same time, the spiritual wood inside will break because it cannot withstand the powerful impact. Therefore, this can only be regarded as half a disposable item, which is specially made by me for the giant beast unit."

It seems that this is another high-cost consumable, but it is still within Xia Qi's acceptance range.

As mentioned before, spiritual wood is divided into several levels from different years. The more the spiritual wood is, the better the effect of the pattern engraving spell.

Take the magic arrows of the elves as an example. Ordinary elves magic arrows use spiritual woods less than a hundred years old, while high-level elves magic arrows have to use spiritual woods more than a hundred years old.

The stronger the spell you want to engrave, the higher the requirements for the year of the spirit wood, and the stronger the power and effect of the spells displayed.

In such a large forest of elfs, there are still quite a lot of ordinary spirit trees under a hundred years. Otherwise, they would not be able to withstand the speed of arrow consumption of elf archers.

The spiritual wood in this spell harpoon uses ordinary spiritual wood.

But even so, it is a relatively precious material.

The creation of this spell harpoon is based on the design of the elves' magic arrows.

This project, Budro probably helped a lot.

Xia Qi's gaze subconsciously swept across Budro, feeling the Emperor's gaze, and Budro, who had been quietly waiting beside him, bowed slightly.

Compared with the quite familiar and casual Xia Fox, Budro was still a little restrained when facing him.

However, there is nothing we can do about it.

Because in fact, the elves are a race that pays great attention to bloodline and status.

Get back to the point.

Xia Qi stopped experimenting with spell harpoons because it was too expensive.

Just have a similar number in your mind.

Judging from the power of harpoon gun spell shooting, if combined with spell harpoon, the power is probably equivalent to an underwater cannon.

In order to deal with deep-sea monster units like Hydra, Xia Qi also accepted it.

However, the focus is on the means of dealing with ordinary fishman units.

Facing the army of the fishman, this harpoon gun must be made at least a thousand to come in handy.

If the number is small, it will not make much sense.

Then Xia Qi and Xia Fox confirmed the manufacturing cost of the harpoon gun. Sure enough, many precious materials appeared in it.

Fortunately, the number is not very large.

However, it is precisely for this reason that Harpoon's output can be increased several times at once.

However, before that, Xia Qi had another very important issue that he had to confirm, that is, how many times could the spell shooting of this harpoon gun be activated!

This is also an important factor that directly affects combat effectiveness and cost.

The water-type magic crystal embedded in the harpoon gun is almost as big as a table tennis ball. If he attacks two or three times, he will be bankrupt, then he is afraid he will not go bankrupt on the spot.

In response, Budro, an elf craftsman, replied: "Your Majesty, please rest assured that the spells on the harpoon gun are buff spells that increase the rate of fire and permeate, rather than actual attack spells, so the consumption of elemental power is relatively low."

"The attack spell on the spell harpoon has magic crystals inside, and does not require the power of elemental power on the harpoon gun. Such a magic crystal should be able to support ten attacks."

Speaking of this, Budro, who took the harpoon gun, directly lifted the hollow lid on the water-type magic crystal, and then simply twisted it, and took out the water-type magic crystal embedded inside.
To be continued...