I call the multiple activation method of lining up D-particle formations "multiple parallel activation. Using the "Crash Ball," which can be learned at magic level 10, and attacking with multiple parallel activation, you can take down even the big ones. I thought this technique was important. --It would be nice to teach it only to those who joined the batallion.

　It was getting dark around me by now, so I stopped practicing multiple parallel activation and went back to the middle boss room. I brought the shadow puppets out of the shadows and prepared dinner to eat.

　After finishing my meal, I began to think about Vritra's nest over a cup of tea. I found that it takes practice to become proficient in using multiple parallel activations, so I conclude that a new magic is needed to counter multiple Vritras.

Now," he said, "we need to develop new magic. And Metis, I need your help."

　Elmore looks back with Taabo in his arms.

I understand.

　Elmore lowered Taabo to the floor and sat down beside me.

What kind of magic do you want?"

I'm trying to make the magic like flying long blades."

　If it is designed for long-range battle, it will be difficult to hit the target. Therefore, we thought that if we could make a long blade of D-particles and send it flying, the hit rate could be improved to some extent.

'Is it a long blade? ......What shape do you make it?'

When we think of flying blades, we think of shurikens, chakrams, and boomerangs. "Considering the point of making it bigger to increase the hit rate, a circular chakram or a boomerang shape would be the best. I think I'll try a boomerang shape this time."

　Star-shaped shurikens like those used by ninja could be considered, but were not included because they would likely increase the amount of D-particles.

'Is it a boomerang? ...... Then why not make it crescent-shaped?

　Metis and I discussed it and decided on a two-meter-long crescent-shaped boomerang.

The problem is the characteristics it incorporates."

The D-particle primary mutation must be "spatial oscillation," and the candidates for the D-particle secondary mutation are "dispersion suppression," "vector control," and "vector acceleration.

　I wish I could grant all three, but my current technology is limited to two characteristics of D-particle secondary mutation. I will try to set up the form of the D-particle by starting up the wise system, and grant and the three characteristics.

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　＜I was able to add . ＜I tried to use to combine , , and into one, but to no avail.

Ah, which ones to cut out."

　I decided to discard the characteristics of Vector Control. ＜I use "composition" to give it "dispersion suppression" and "vector acceleration" all in one.

　This would incorporate power, long range, and speed.

'How powerful magic would be if there were no limit to the number of characteristics that could be incorporated. It's a shame.'

It can't be helped. Life magic is still in its infancy.

　With my new magic in shape, I decide to rest early.

　The next morning, I wake up around six o'clock, eat breakfast and get ready to go exploring. We descended from the fifth to the sixth layer and headed for the eighth layer in the shortest possible time.

　When we arrived at the eighth layer, we decided to go to the giant tree rising in the jungle to try out our new magic. He stopped about 200 meters away from the giant tree and started up the wise man system.

　The D-particles gather and transform into a two-meter-long crescent-shaped boomerang.

　The D-particle boomerang spun and flew forward as if popping, instantly accelerating to a speed that could not be followed with the eye and reaching a giant tree. The sharp blade bit into the trunk of the giant tree, which had a diameter of five meters.

　The moment the blade bites halfway into the giant tree, the built into the crescent-shaped boomerang is activated, and spatial vibration waves extend from the boomerang in all directions, crushing the trunk of the giant tree.

　A huge tree, five meters in diameter, was cut in two with a single blow. It was quite a heinous magic, as the only way to defend against it was to avoid it. The giant tree slowly began to fall forward, and when it fell to the ground, a roaring sound echoed through the air.

It's a very powerful thing."

　Elmore and I approached the fallen giant tree and examined the cut. The cut was smooth and there were wood chips around it.

sawdust

The wood chips are scattered about. They are probably wood chips crushed by spatial vibration waves.

How fast do you think a D-particle boomerang can travel?"

　I asked Metis.

Based on the timing of the hit on the giant tree, I'd say it was about 800 kilometers per hour.

"Wow, it's that fast. ＜Must be the effect of vector acceleration.

'Come to think of it, D-particle boomerangs don't bend.

　Metis seemed to think that because it was a boomerang, it would fly in a curve.

You don't want something like that circling back around. Besides, it would lower the hit rate, so we adjusted it so it would go straight."

　This magic consumes the magical power of 30 "Crash Balls". As a result, demons sensitive to magic power will sense something is approaching. However, since it is fast, it will feel that it has hit the target when it notices it.

　There may be exceptions, however, as some demons are extraordinarily agile.

What would you like your name to be?"

Yes, let's go with ...... 'descrescent'."

　Incidentally, the magic level to learn "descrescent" is "18".

　After a few tries, I was able to smoothly activate "Descrescent". However, it seemed to consume a lot of magic power and I almost ran out of magic power. I recover with the all-purpose recovery medicine in the immutable bottle.

　We then headed to Vritra's nest.

We need a plan on how to defeat Vritra and the others.

It would be a good idea to shoot the fireworks-like magic created by the Wise Men's Review Board into Vritra's nest, and then shoot "descrescents" at Vritra as she emerges from her nest."

　They thought about shooting powerful magic into Vritra's nest, but decided against it because they thought it would be a complete disaster if the treasure chest was also blown away. Well, it was only natural, since the goal was the treasure chest.

'Speaking of which, have you given a name to your pyrotechnic magic?'

Yeah, I went with 'Firework Arrow.'

　Approach Vritra's nest to see how many Vritras are there.

Six today, or one more.

I can only describe it as bad luck."

　Whether you have five or six animals, what you do is the same. I launched my "Firework Arrow" from about 200 meters away from Vritra's nest.

　A rainbow-colored arrow takes flight and explodes a beautiful light like a firework in the middle of the nest. Vritra and the others were only surprised because the explosion was not powerful at all.

　However, he understood that he was attacked, so he came out of his nest and leaned over his sickle neck to start looking for the enemy. At that moment, he activated "descrescent".