We are currently on the 20th floor of the Rock and Sea dungeon now, with the intention of finding an A rank magic core (for which I have to find an A rank monster) as well as the water crystal stone. Fortunately a high rank monster can always be found near the crystal and since this is the 20th floor, my guess is that an A rank monster will be the one guarding it

(Let just hope that an S rank monster won't be the one showing up) [Ash]

While I'm confident enough on taking an A rank monster head on, S rank monster is another issue altogether. They might be only a rank apart but the difference between their power is like between a day and night

(Time to use my search magic) [Ash]

"Brother Ash, I can feel someone looking at us from the sea there" [Charlotte]

"Really?" [Ash]

No harm on scanning the area that Charlotte pointed at, and...

"Mermaids?" [Ash]

"Mermaids!" [Kids]

Ohh, just like me, they're all excited to see a mermaid. Still, aren't mermaids known for luring their victims into the deep sea just to drown them? As far as the old tale back on earth, that seem to be the case, but I couldn't find such evidence here on Achalasia, maybe they're nice? The knowledge bestowed to me by Goddess Achalasia didn't warn me about them

"Isn't that little girl with blue hair..." [Mermaid A]

"Maybe, her mana is similar to him" [Mermaid B]

"Shall we approach them?" [Mermaid C]

"Wait, get back quickly now! A stealth giant Megalodon on their way, and there's a whole group of them!" [Mermaid D]

"What!" [Mermaids]

The mermaids seem to be in a panic, I'm pretty sure it's because of the group of Megalodons that I sense nearby them. 

(They didn't seem hostile, I should help them) [Ash]

With my adaptability magic quickly being applied to my body, I quickly withdraw my scythe and enhance it with wind magic before throwing it out towards the group of Megalodons. The leader of the pack, a black stealth megalodon is an A rank monster who magic core would be having a mixture of water and dark element. Now that's rare

The group of mermaids already disperse. Good, they would only get in my way should they stay there or decided to become a spectator from afar

As the scythe finds itself back into my hand, a blast of scald magic hit my left hand, and not only that

(Multiple water arrow incoming!) [Ash]

The group of Megalodons started to attack me aggressively, they even use water jet propulsion magic and try their best to crunch me from all directions. The lower rank Megalodons shouldn't pose much problem however

(I can't sense the stealth megalodon...) [Ash]

This is bad, even my scan and search magic yield no result

~Boom!~

(Shit!) [Ash]

That cannon really hit hard. Looks like our battle have caught the attention of a group of giant crab cannon, no 

(They're synchronizing pretty well, Is this because of the stealth megalodon?) [Ash]

Couldn't think of other reason, it could be just a coincidence, but still

(Even the ink squid!) [Ash]

They try to block my field of vision by shooting out inks from their body, but fortunately my Ice Shark missiles do a great job of crunching them, and they even defeated those giant crab cannon for me

(Oh no you don't!) [Ash]

The other Megalodons try their best to destroy my ice shark missiles, but I'm not gonna let them do that! I do know shark (and most fish, no actually all fish) rely on their fins to help them maneuver around the ocean, so even if I can't hit them and finish them in one shot, I should target those areas to significantly reduce their mobility, that way they wouldn't become much of a threat

(A mana!) [Ash]

I detected a dark magic mana approaching me fast, and I quickly propel myself out of the way and thank god I did otherwise that leader of them would surely have a human for his breakfast

(Here!) [Ash]

I shoot out a giant light arrow towards the stealth megalodon but unfortunately it missed and instead hit a nearby group of Megalodons. No,not just a megalodon, they're currently multiple species of marine monster that surrounds me

(If these keeps on going, my mana would surely be depleted fast, so...) [Ash]

Instead of aiming them one by one, I should just slayed them altogether, I'm surrounded after all, so...

(Exploding thunder magic) [Ash]

By using thunder magic, I shoot out the magic into all directions, adding a fire explosive mana into it, that way the thunder magic that are dispelled towards all directions get the extra boost of power they needed

Most of the marine monsters now are dead, and as for the surviving one, they're in pretty bad shape. Even healer sponge who are being shielded by them can't heal them fast enough, and not to mention the fact that I wouldn't let it happen. Those sponge as well as the surviving monsters are meet with their demise as my Scythe slice them clean

(Now all that's left is the leader) [Ash]

I still couldn't detect the stealth megalodon and neither does my ice shark missiles. Still, judging by it action earlier on...

(I should create more ice shark missiles) [Ash]

This might cause some drainage in my mana but I'm hoping for one of them to be attack by the stealth megalodon, that way I can detect the sudden surge of mana from it and react accordingly but sadly the stealth megalodon is smarter than I thought

(Could it be because it already escape? No, my intuition telling me it's not...) [Ash]

Should I lure it? With what? 

(!) [Ash]

Just as I am thinking of using myself as a lure, the stealth megalodon attack me once again with darkness magic before completely disappearing once again

(Guess I'll just use myself as a lure) [Ash]

Since the Ice missile sharks will only make the stealth megalodon even more wary, I should just dispel it, and as soon as I done just that

(There!) [Ash]

Another attack, and thus begin our game of cat and mouse. This keep ongoing for ten minutes before

(I got you!) [Ash]

Instead of shooting it with the intention of killing it, I shoot out a light ball magic so that it would get attached to the stealth megalodon,and thank goodness it's a success 

(I can detect my mana on that freaking megalodon now!) [Ash]

With my thunder magic being maxed out, I shoot out Thor Hammer magic into the stealth megalodon, and it hit!

(Not so fast!) [Ash]

You can't run away! 

(Homing thunder!) [Ash]

The thunder spell quickly zaps the stealth megalodon and as to properly finish it off, I threw my scythe to sliced it off!

(Become my sushi!) [Ash]

And it's done. Now to collect the loots. I should just let my ice shark missiles do that job, as for me, I will collect the water crystal stone nearby

.

.

.

It sure is big, I think it's slightly larger than the one inside the drainage, should take it with me now. Time to go back into the surface

.

.

.

The kids are grouping the loots. The ice missile shark bring those loots to them when I'm busy searching for the crystal, and one loot have caught all of our attention

"A marine spawning block!" [Ash]

"It is" [Rean]

"Another rare item" [Elise]

"Will you be using it to upgrade the training hall?" [Kara]

"I think I will do just that!" [Ash]

Better start planning it now itself

"Mermaid?" [Charlotte]

"It isn't there anymore" [Farhah]

"Too bad" [Singa]

"Yeah, I wanted to see one myself" [Savel]

"You couldn't find them Brother Ash?" [Zerolith]

"I try, but unfortunately they're nowhere near us now" [Ash]

"Guess it's just a coincidence that they stick close to the main road just now, otherwise I doubt Charlotte will notice it" [Mara]

"Agree" [Karon]

Now that Mara mentioned it, just how did Charlotte detected the group of mermaids? Coincidence? I don't think so.

"Let just go home, we got what we want" [Ash]

"Right!" [Kids]

And our trips inside the dungeon have come to its end

As we enter the bus golem, I noticed that a knight coming from Malsia rushing through with his thunder horse, I wonder why

(Well, maybe it's sending some important message. None of my businesses) [Ash]