Wizard: I brought the wrong system.

Chapter 372 Water Mirror Technique - Surveillance Drones

A moment later, Yaro suddenly realized.

"Isn't this a ready-made communicator?"

Back when he was at Owl Academy, Yaro had the idea of ​​making communication equipment, but due to a series of troubles that came too quickly, he ran away from the academy before the communication equipment was completed.

"This trick can not only be used as a means of communication, but also as an excellent detection trick, which makes up for the lack of my means."

Although the Cat-Shaped Fist can sense the surrounding movements, it cannot directly see what caused them, and the range of its perception is too small.

When they first arrived in the Kingdom of Lanelli, if Yaro had mastered the Water Mirror Technique, he could have cast it on the river and found Perrin Manor very quickly, without wasting time in the wild.

Of course, to make good use of it, you must first understand the basic properties of the Water Mirror Technique.

The back window of the cabin quietly opened, and one after another, water balloons the size of quail eggs floated leisurely into the wild.

Just like raindrops, it's hard to tell it's raining unless they fall on the ground or onto your body.

A water balloon the size of a quail egg is no bigger than a slightly larger raindrop, and it would be difficult to spot even during the day. Now that it's dark, as long as you're careful not to let the light from the window shine on it, there's no need to worry about being discovered.

……

"At its fastest release, it can fly thirteen meters, but due to the excessive speed, the water sphere shakes violently due to the wind, making the image displayed in the water mirror too blurry."

"To maintain the stability of the image on the water, the maximum speed cannot exceed half a meter per second. If there is wind, the result may be even worse."

"After the water sphere landed, it shattered immediately, and the internal magic pattern structure was also destroyed."

Therefore, it can be seen that the Water Mirror Technique is best used in advance, or in combination with other methods.

"How far can the signal from the Water Mirror Technique travel?"

The farther a signal can travel, the larger the space it can utilize.

To determine the maximum distance the water mirror signal can travel, the best approach is to leave the cabin and find a flat area outside to conduct the tests step by step.

But now that the enemy is in the dark while we are in the light, if we act recklessly, we might be ambushed.

—The remaining refugees from several surrounding towns have basically gathered here. Since the Fernando family's goal is to establish a realm of the dead, aren't these gathered refugees a delicious piece of meat?
Once this refugee camp is destroyed, it will be difficult to find such a perfect natural stronghold again. Like dominoes, it can sweep across the weak rear and eventually destroy the entire earldom!

"The Water Mirror Technique might be useful soon, so let's verify how to use it in conjunction with the Water Mirror Technique now."

For now, Yaro has only come up with two ways to coordinate.

One method involves using transparent objects, such as glass or ice, and placing them on a hot air balloon to continuously monitor an area.

Another option is to use it in conjunction with the 'Feather Fall Technique'.

"By borrowing the principle of 'dragonfly skimming the water,' we can make the observation water sphere levitate and move forward."

"The hot air balloon is too conspicuous right now. Let's use the 'Feather Fall Technique' in conjunction with it and see how it works."

I still just copied the answers to my homework.

The instant the water ball leaves your hand, quickly apply a "Feather Fall" spell to it, cast in the style of "Dragonfly Skimming Water".

Turning around, Yaro saw the dim scene reflected in the water mirror, and his spirits lifted.

"It really works!"

The "dragonfly skimming the water" action converts wind resistance into upward thrust, which partially cancels out gravity. The remaining force, which is not completely canceled out, will only cause the "water ball" to move forward while slowly rising, eventually maintaining a balance point.

Since the water sphere itself is not affected by much external force, it is naturally able to capture a stable scene.

"Because the outer structure cannot be further controlled, the water sphere will rise in an arc, and after reaching the crest, it will circle around a small area, and then continue to rise in this repeating pattern. This trajectory is somewhat like a falling, drifting leaf." "If the angle is adjusted further, could the 'observation water sphere' be made to circle around and observe the surrounding situation?"

This level of modification was not difficult, and Yaro quickly found a suitable alternative structure from the previous design of the 'Feather Fall Technique'.

It is a variant of the "Dragon Swimming Technique". By using the initial velocity of the "water ball" and the deflection effect of the "feather falling technique" on the resistance, gravity and resistance are converted into centripetal force and deflection force, thus forming a circular swinging motion.

After calculating that there were no theoretical errors, Yarrow began the actual operation.

After copying the answers so many times, Yaro had developed a certain degree of muscle memory. He could now perform the "marked water ball" from the "Water Mirror Technique" without even looking at the blueprints on the wall.

Of course, this is also related to the fact that the magic pattern structure of the 'marked water ball' is relatively simple. For example, Yaro cannot use it independently in the Water Mirror Technique.

"Let's see how the new structure works."

Using the same method, first cast the spell 'Marked Water Ball', then quickly apply 'Feather Fall' to it.

result……

Snapped!
A few drops of water slowly slid down the wall.

Yaro slapped his forehead: "I almost forgot this isn't an open space; we also have to consider the obstruction of the wooden house walls!"

"The water sphere's initial velocity needs to be increased, and its arc also needs to be widened. With a faster initial velocity, it can rise faster under the 'Feather Fall Technique' structure, and with a wider arc, it can bypass the walls of the wooden house."

After modifying some parameters, Yaro released the water sphere again.

Soon, another inconspicuous little water ball flew out of the window. It seemed as if there was an invisible rope above it, and it began to swing and circle backwards the moment it was pushed out.

But at this moment, the small water sphere, which was moving regularly, suddenly lost its stability.

As if an invisible rope in the middle had become entangled with something, the ball continued to move around, but the trajectory it was taking was getting smaller and smaller, and at the same time it was rising rapidly.

While looking at the water mirror, Aro noticed the problem and, upon hearing the sound of the window shaking, immediately discovered the cause of the change.

"Mountain wind... Fortunately, this wind is blowing from bottom to top. If it were a wind from another direction, the centripetal balance of the water sphere might break down. Once the centripetal balance cannot be maintained, the water sphere will fall down immediately."

Yaro looked at the scene reflected in the water mirror and wrote down his conclusions in his notebook.

[It's impossible for there to be no wind at high altitudes, and often the wind direction at high altitudes cannot be felt from the ground... Does this mean it's not applicable to high-altitude environments?]

[Furthermore... even in low-altitude environments, there are many changes. Wind direction can change, and the Featherfall Technique attached to other objects cannot be adjusted at any time like the 'Dragon's Movement Technique.' Once the wind direction changes, the trajectory of the observed water sphere will also be disrupted.]

……

The 'observation water sphere' can be compared to a 'paper airplane', and the 'feather drop technique' it releases is like its wings. Once it's released, it can only drift aimlessly afterward.

However, a 'paper airplane' is just a 'paper airplane' after all; it's not expensive and can be thrown repeatedly.

A few paper airplanes can be used to monitor drones, making it a worthwhile deal.

With this method, we won't need to rely on the pendant to ascend and observe directions for navigation. After all, the spells fixed on the pendant are those of a formal wizard, which would be too much of a burden on the magic power of an intermediate apprentice.

After observing the scene in the water mirror and confirming that he had arrived in the correct direction, Yaro peered into the water sphere in the sky.

"It's about twenty meters away, right? What's the signal limit of the Water Mirror Technique... Wait a minute!"

Yaro suddenly noticed something and carefully observed the area above.

"Why are there lights on the mountaintop? Do they have guards stationed on the cliff top as well? How did those guards get up there?"

Thank you so much to 'Flight 404 of the River Crab God' for the daily recommendations, and thank you everyone for your unwavering support 'T-T'

(End of this chapter)