Jin in Horai Island was watching the situation of the <> and the <>.

He instructed them to be ready to send out the <> immediately if there was any danger.

"But it's a pity that we can't coexist.

<

They occasionally migrate southward on the ocean currents.

They are ferocious and carnivorous. They attack fishing boats and devour marine resources, so it is said that coexistence is impossible.

Because they are demonic beasts, they occasionally use tidal waves.

Since they devour fish in the vicinity, it is not enough just to get rid of them, but it is necessary to defeat them.

Jin regretted this.

"But it's not the same as eradicating them.

<, Jin had no intention of destroying what had been stable for tens of thousands of years.

"Okay, stand by."

<

It is a mermaid-shaped golem unit that specializes in underwater operations and can swim at speeds of up to 400 kilometers per hour underwater.

During normal times, they search for and collect undersea resources.

A single unit can take on a Death Serpent.

Twenty of them are on standby in case of emergency.

"I hope this is all for nothing..."

Jin stared at the < with bated breath. .......

* * * *

<<1st fleet, 1km from target>>

Chief, we are on schedule.

Manon, who is receiving reports from the various units, reports to Tomax Bartman.

Only in such an emergency situation, we are supposed to call him <>. It is shorter and easier to call.

"Okay, attack the target as soon as you see it."

"Aye, sir."

One minute later, the first fleet spotted three <>.

Although the ship is a half-timbered vessel, its exterior is covered with thin sheets of light silver, and important parts such as the bridge and engine room are armored even more heavily.

She is a monohull, but is slightly wider and designed for buoyancy instead of speed.

She is very stable and has been used for rescue operations in stormy seas.

"Attack!"

The arrowheads are heated until they turn red. Fired from a huge bow gun, four of the ten arrows hit the target, two from each ship.

Two, one, and one arrow pierced the three Death Sea Serpents.

Each arrow was about one meter long, slowing the Death Serpents down somewhat.

"Second shot!

Ten arrows were fired again, but all of them fell into the sea. This is because the Death Serpent dived.

The Death Serpent has dived!

Okay, we're under attack.

The depth of the water is about 10 meters at most. The water is so clear that they can see where they are from the air.

The second airship squadron chases after the fleeing Death Sea Serpent.

"The distance from the first fleet is over 200 meters!"

"All right, fire the cannon!"

A thunder cannon is a magical device that can fire a thunderbolt of magic.

In the past, when Reinhardt attacked Death Serpent with a potlock, he used a wand containing a magic formula to release a Flame Lance, but this is a larger version of the wand, and the mana is supplied from a mana tank. The lightning magic is electricity.

Lightning magic is electricity, so it is effective against monsters and beasts in the sea. However, its range of effect is limited, so it was released after confirming that the first fleet was far enough away.

Literally struck by the lightning, the Death Serpent surfaced on the surface of the sea.

"Release!"

Aiming at the serpent, the cannon fired again.

"It's done!"

At least three of them, who seemed to have been stunned, floated on the surface of the sea without any power.

"One more shot, just in case!"

"Yes, sir!"

The third thunderbolt was fired.

With this, the threat of the Death Serpent is over.

Leave the rest to the first fleet. We're coming home.

Yes, sir.

The second squadron of airships turns around and heads back to Avalon.

"Oh, you did it. After confirming the death of , the 3rd, 4th, and 5th ships will tow one of each back to the ship."

The first fleet will tow the carcass of the Death Serpent back to .

They are going to use them as raw materials.

Also,

"There are not many fish because they were eaten by the Death Serpent, but we will collect them and return home.

In the aftermath of the thunder cannon, many of the fish in the surrounding area floated to the surface. We are going to collect them and return home.

For the time being, fresh fish will be on the menu in the dining hall of <>.

* * * *

"That was a close fight, wasn't it?

<

In Horai Island, Jin has just instructed the Mermaid team to return to their normal duties through the old man.

"I wouldn't say it's an everyday occurrence, but <> and <> are fulfilling their functions, aren't they?

Jin is glad to have made it, despite the hardships.

"What about that <> as a material?"

Jin recalls that in the past, leather was used for power transmission belts.

<

"Oh, I see."

The <> would be even inferior to the Grand Dragon, but it might still be useful, the old man said.

"I'd like to check that out too."

The old man said that Death Sea Serpents sometimes come around Horai Island, and that he would keep one for himself the next time he found one.

So far, they have only been able to drive them away.

Jin hoped that this would increase the production of effective medicines, which would be good for the world.