There was no sign of anyone around us using magic, but as long as we saved the magic for emergencies, there would be no problem using it to dig a hole.
　In order to finish digging the hole quickly, I deployed a pressure spell in the ground and started to cast it.
　This is a basic spell with a magic power of about 0.5 that I have used against bandits.
　As planned, the spell is deployed about 30cm underground and makes a buzzing sound.
　Then, a little later, the earth rose up and was blown away .......
　If you think about it, it's no wonder that a single moment of magic can't blow away a lump of earth so easily.
　The explosive magic that blew away the earth and sand when removing the Zunana grass is the kind of magic that consumes enough magic power to blow away hard trees in square kilometers.
　However, using that fuel-efficient magic would not be very efficient, and more importantly, it would be dangerous.
　All right, let's try to develop some magic for a while.

　In the first place, the spell I'm using to interfere with objects from the outside is converting magic power into pressure or explosion, which is the cause of its difficulty.
　If you don't want to attack, but just want to move things, you can use magic in that way.
　Therefore, the spell you use should be one that affects the entire area of the target with something like gravity or magnetic force.
　In other words, it is like creating a field that interferes with all the objects inside.
　It is not so difficult to imagine.
　Aside from gravitational fields, even an ordinary high school student on Earth knows that electromagnetic fields can be easily created by humans.

　Using this magic on the area that I just tried to lift up, I try to carry it outside the moat, to the place where the second wall will be built.
　Then, the target soil moved quickly to the target point as if it were a landslide moving upward.
　When I moved a little further and tried the same thing again, the same phenomenon occurred.
　The spell, which I activated after building up magic power on the spot for about 10 seconds, dug a hole in the spot where I was with a wall about 4 meters deep and a radius of about 5 meters, and piled up a lump of earth of the same size on the side of the wall.
　I'm not sure if this is a good idea or not, but I think it's a good idea. ...... Some kind of magic has been created that looks like a large piece of heavy machinery.
　I'm a heavy machine myself.
　If this doesn't work, I was thinking of using water pressure to break the ground and use an item box to move it, but to no avail.

"Whoa, whoa, whoa, what's going on here?

　An adventurer who was digging a hole some distance away approached us when he saw the hole, or rather the soil that had been dug out of it, was obviously bigger than the time it had taken to dig it.
　He doesn't seem to want to skip work to talk to us, though, and continues digging in the dirt nearby.

You said it would take a while to dig a hole, so I thought I'd use magic to shorten the time. 　I've just succeeded.

　This spell ...... could be called an upside-down landslide, as it looks.
　It might also be useful for stopping multiple opponents. ...... Although it would be faster to kill them normally.

I'm not sure what to make of it.　Don't do it. Don't do it.

"Why not?

　I wonder if there have been any failures before.

Magic is the lifeblood of a wizard, and no matter how much you have, you should save it for emergencies. 　If you die in order to save time, it's not worth it.

　Oh, you're worried about magic power?
　It's a useless worry for me, since my MP is still stuck at the upper limit even when I use all my magic power.
　The only thing that restrains me from using magic is the amount of magic power used per unit of time.
　Even so, the amount of magic power used per unit of time has increased greatly compared to the past.

"Don't worry, no matter how much you use, you won't lose much magic power. 　You'll recover faster.

Hey, hey, hey, that's ......

Otherwise, he wouldn't have flown so high just to scout the area.

...... Is that what you think?　There's something wrong with that.

There's nothing wrong with that. 　I'm not sure what to make of this.
　You can't just dig a hole without permission and then say, 'You can't just dig a hole.

If you want to use ......, please ask permission from Artem on that platform.

　When I looked in the direction the adventurer pointed, I saw an adventurer with a small bow in his hand on a platform about three meters high and piled up with earth.
　He seemed to be looking at me, and our eyes met.
　I wave my hand in his direction to ask for permission, and fly up to him with my magic.

Can I use magic to dig?　I'm going to be digging like that.

"Yeah, it looked like you were doing something, so I watched. 　I've never seen magic like that before, where did you learn it?

I didn't learn it. 　I just made it.

You made a spell at ......?　What do you mean?

What do you mean?　No, it's just an image, using magic. 　See?

　I'll just improvise a spell and make it work.
　It's a spell to make water float around a fire to create a blurry light.
　It has no meaning.

...... I've never seen that spell before.

"I just made it. 　Is it unusual to create magic?

I've never even heard of anyone making magic today. 　Well, we'll talk about that later, since we're still in the middle of a battle. 　Of course you can use magic, but when I tell you to, join the attack, okay?

"Okay. 　I'll do it.

　Permission was easily granted.
　Artem instructed me to open the place where I would dig, and the place where I would dig was opened.
　I entered the area and used the upside-down landslide in succession.
　The adventurers who were in charge of the area I dug are preparing the moat for use, which has been made roughly useless by magic.
　The work was carried out much earlier than originally planned, and when the moat and walls were half completed, Artem gave the following instructions.

"Change!　Team A to defend, Team C to work on the moat, Team B to take a break!



　It's time to change shifts.
　The battle for Brokens is going to be a week long, and as expected, not everyone can keep working.
　Naturally, there will be time for sleep. ...... Three shifts (but the working hours are two-thirds instead of one-third, and of course you can't sleep in peace), a working time that would make a black company look like a black company, but it's not so impossible.
Some people believe that "impossible" is a word for liars.
　It doesn't seem to have much support.

　The reason I brought the rubble here was to make it as safe as possible.
　Half of the adventurers here are sleeping in groups of about six each between the first and second walls, and the other half are heading towards the wall I built.
　A little while after Group A reaches the wall, Group C moves to the moat, and the shift change is complete.

　But my work is still the same.
　I'm not needed at the moment, but since my ability is unique and cannot be replaced, I'm treated as a member of the "Kaede Team".
　The position of the group is very flexible, and you can be anywhere you can hear instructions.
　Unless there is a special situation, you are free to sleep and eat at any time.
　I'm told that if I use magic to protect myself when I sleep, it should be enough to wake up adventurers, but my defenses are not that high, and my senses are not dull.
　I wonder what the mayor who gave this order thinks of me.

　Anyway, I continue to work on expanding the moat as usual.
　The adventurers who had been instructed hurriedly moved around the area, building up the moat and walls.
　The work was about 80% done.
　The sound of explosive magic - a very small one that was supposed to be used in the event of a bombing call - is heard.
　Something had happened to the defense line.
　A voice ahead of me says it's a large pack of demons.

　I hurriedly gained altitude and searched for my target.
　Then, about 50 to 100 meters away from the wall, I saw a group of black lizard-like monsters about four meters long charging toward the wall.
　I quickly assessed the area within the range that would not involve my allies and bombarded it with magic.
　It's no good if you can't get around the front of the pack, so leave it to the other adventurers.

　I don't know what the demons are, but the power of the magic is steady.
　With a roar, the lizards are torn to pieces, and those that don't are blown to pieces and become immobile.
　I didn't get a chance to examine them one by one, but it was clear that they would die if left alone.
　After I finished blowing away the swarm of probably 200 demons, I looked at my feet and saw that the lizards I had failed to kill - Kuro Lizard, according to the appraisal, just as they looked - were almost completely wiped out. The lizards that I had failed to kill - Kuro Lizard, according to the appraisal, and they were still looking like it - were almost all dead, and I was down to the last three.

　I see an adventurer with a sword slash at one of them, then leap back to dodge the Kuro Lizard's counterattack.
　As expected of a high-ranked adventurer, he backsteps about five meters, a move that would be impossible for a human on Earth.
　He also dodges the attack of another Kuro Lizard near the landing site without losing his balance, and keeps his distance.

　However, this adventurer's evasion skills aside, it seems that he was fatally unlucky.
　The adventurer was just off balance when the Kuro Lizard landed, and his kick was a clean hit.
　The adventurer is struck in the back and waist area, and blown nearly 10 meters away.
　The adventurer was sent flying backwards, so there was no follow-up blow, but even for an adventurer with a body strong enough to leap over five meters on his own, that was not good.
　At best, he would have broken at least a bone in his hip, and at worst, a fatal wound.
　Thinking that I might be able to get away with some recovery magic, I descend while watching the lizard that attacked the adventurer being beaten to a pulp.

　I land on the ground and try to talk to the adventurer.
　But there's something wrong.

"...... Good.

　The adventurer then stands up and returns to his post as if nothing had happened.
　In the adventurer's hand, he is holding a sealed container of a medicine with a lame name.
　A mysterious recovery that would only happen in a game on Earth was happening in reality as if it were natural.
　The friends of the adventurers who call out to the returning adventurers don't seem to be particularly concerned.
　...... It seems that the adventurers of this world are quite adaptable, as this happened less than two days after the drug was developed.

　In the end, except for a few bombings by me and a few super-healed adventurers, nothing happened and the wall and moat were completed to the extent that they could protect the carpenters and the other adventurers.
　It was so easy that it was almost anticlimactic.
　With magic that blows up enemies over a wide area, healing potions that bring you back to life instantly if you're not dead, and heavy machinery, it's not surprising that we have all this.