By the time Bune arrived at the end of the cave, he was naturally exhausted, though he had been acting with no disruption to his concentration for several hours, when he discovered and released the traps in the cave.
　If the Rays were a regular party, it would have been fair to conclude their search here today and camp them out.
　Fortunately, there are no hostile monsters in this hidden cave.
　That is to say, there is no security problem with camping.
　It's a different story, though, whether you're willing to camp out in a cave full of traps.
　In the case of Ray and others, however, they didn't seem to care at all and were searching for the place where they had left the cave.
　But that's natural. Going down the steps in the forest, I found a hidden door in the space, which looked like a hollowed-out rock, knocking down the plants of the rock there -- not monsters, so I don't know if the expression of knocking it down is appropriate -- and I went through the cave leading from there.
　I didn't know what the intention was, but I kept moving on, releasing a large number of traps there... for what I could call a subterranean lake had spread to where I arrived.

"The reason the water shines is probably because of the moss growing in the water, though I've never seen it before."

　Marina mutters as she looks into the subterranean lake.
　As you say, there are many lights in the subterranean lake, such as red, blue, yellow, and green.
　It's very different from the lake that comes to mind with the image of a subterranean lake.
　However, it was fortunate for the lays that the moss that glittered in the lake and stuck to the walls of the cave were the sources of light.
　If it had not been for mosses, this place would probably have been covered in darkness.
　In that sense, there is no doubt that the colorful moss that exists in the water is a very welcome thing to do.

"It continues from the cave, but the rocks don't shine here. ... I don't know much about dungeons because I haven't had that much experience with them, but what does every dungeon look like?"

　Ray shakes his head when asked while looking at a considerable underground lake.

"Dungeons are very different. There are places like this and places like that. As far as I know, there was no place for dungeons to have no light source, so you don't have to worry about that."
"...it's quite convenient for you,"
"I don't think so, but ask Dungeon's core for a detailed explanation. I don't know if you ask me."

　Rey answers that way, but in fact, he has destroyed the nucleus of the dungeon several times by using death size.
　As a result, Death Size remembers the skill of topographical manipulation.
　Unbelievable, if Relieu had known the circumstances around him, he would certainly have gone into Ray's story.

"Anyway... is it a dead end in this subterranean lake after all? If that's the case, I think we need to think about what we're going to do now."

　Vihela mutters, looking around the subterranean lake.
　In fact, even though we've come this far as you say, if it's a dead end, we can only go back.
　Of course, it is probably certain that this subterranean lake has some meaning.
　Still, given the current situation, it didn't seem like there was anything here.

"If I were to look into it, it would be that subterranean lake."

　In Vihela's words, Elena mutters as she gazes at the subterranean lake, which is lit up with various lights.
　Elena's gaze had found a fish in the lake that Ray had never seen before.

"Oh, there are fish in these subterranean lakes, too. ... Can you eat them?"

　I guess Ray still understands that fish is food.
　But it was probably because this is a subterranean lake that I didn't swear I could eat.
　If this was a river, sea, swamp, pond... or lake, but a normal lake on the ground, I would have sworn that I could eat it.

(Well, I don't think there's anything I can eat... but I'm sure it didn't look very good.)

　For a moment, Ray saw the fish as scaleless as catfish, eel and conger, and with a somewhat curved body.
　Of course, all of those fish are very tasty.
　But if they ask if the fish in this subterranean lake taste good... honestly, Ray isn't sure.

"Ray? What's wrong?"
"No, this subterranean lake. It seems like there are fish. I was just wondering if it would taste good."

　Marina looks a little dumbfounded at Ray's words.
　I don't think this is the time to think about it.
　It's been some time since I went down the steps in the woods.
　In other words, once you get back from here, it will take a reasonable amount of time.
　However, it shouldn't have taken as long as it did when you came here, since Bune had released all the traps in the cave.

"Well, I don't know what Ray said, but as long as there's such a thing as a subterranean lake, I'm sure there's something here. I think so... what do you think?"

　muttered Elena, looking for something suspicious about her.
　In fact, a cave leading to this subterranean lake was hidden by a hidden door.
　That being the case, there is no doubt that there is some secret in this subterranean lake.
　The question would be, what kind of secret it is...

"There is so plain a subterranean lake that it is certain that there is something in it."
"I don't know. Otherwise, I don't know why they went out of their way to hide the road leading to this subterranean lake."

　Marina muttered and looked at the subterranean lake.
　The gaze there is not like enjoying the underwater illumination, but rather thinking about what's here and how to solve the mystery.

"In the first place, I've never seen a subterranean lake before, but is it normal to see a lake this big?"

　Ray muttered as he gazed at the subterranean lake.
　The subterranean lake stretching out in front of us is quite large.

(In Japan, I don't know why Tokyo Dome is the standard for its size, and I don't know how big it is because I've never been to Tokyo Dome before, so I don't know if it's just an expression.)

　Ray reminds me of Tokyo Dome, but suddenly I see a ripple on the water in the middle of the subterranean lake.
　It was naturally the same with the rest of us except Ray, all eyes directed into the lake.
　So... eventually, as if to break the surface, an animal... or a monster appears.
　But that stretch... that's what I couldn't tell how much the rest was in the water, as far as the long, narrow part was concerned.

"A snake?"

　Who was it that muttered so.
　In fact, if you look only at the part that comes out of the water, it was a form worthy of being called a snake.
　...however, considering that the length of the snake is five meters from the surface of the water alone, it would be difficult to combine it with an ordinary snake... with a snake that you would normally see outside.
　and there was a long, disgusting body in the water at the first glance.
　The snake's throat seems to be moving because there's a fish or something there.
　Ray didn't understand that, but what he was sure to understand was...

"Strong,"

　Rellieu mutters next to Ray.
　Yes, he also felt the strength Ray felt from the snake.
　No, it wasn't just Lerieu who felt it.
　Everyone here... even Bune, in the sense of pure combat skill, felt the strength of a snake rising out of the water.

"What do you think?"

　What Ray said was a brief question, but it was enough for those in this room.

"Boss Monster... Isn't it? From what I can see, it's very strong."
"I understand what you want to say, but where is the core of the dungeon... the bottom of the lake?"
"I don't think I'll be any better than the Silver Lion,"

　Are you listening to Ray or not?
　Elena mutters, recalling the strength of the Silver Lion in his previous battle.
　a silver lion who fought to save VihelaIts strength was strong enough to be called a Rank S monster. 　
　Seto, who uses various skills, is treated as a monster of rank S because it is a rare species, but it is easy to predict that if Seto fights against Silver Lion one-on-one, Silver Lion will almost certainly win.
　The Silver Lion had that strength.
　Compared to such a silver lion, the huge snake that is now emerging from the subterranean lake, even though it is a strong enemy, is far from stronger than the silver lion.
　That's why I think Elena is strong in snakes, but there was no sense of hopelessness that she would never win.

(However, that snake is in the subterranean lake. Unlike the silver lion, it needs to be taken out.)

　Just the other day when she went to sea, Elena saw Ray struggling to fight monsters at sea.
　Despite the overwhelming difference in ability that Ray would win if he fought normally.
　...however, Ray was fighting monsters for food, so he couldn't possibly break them to pieces, and he needed to be able to eat them properly and bring them down.
　I also understand that Elena has struggled quite a bit when she fought against Kraken before, so it's very difficult to fight against someone in the water.

"What are you going to do? Are you going to fight?"

　The first person to open his mouth, as everyone spoke about the snake's strength, was Vihela, as expected.
　For Vihela, who preferred to fight against a strong opponent, it was impossible for her to control her fighting spirit against that huge snake, which she recognized at first sight as a strong fighter.
　Vichela also wanted a stronger battle against monsters, as she did not participate in the battle against the Silver Lion.
　to the point of showing in one's attitude whether one can afford to miss such a great opportunity.
　But... some people object to Vihela's words.

"Do I need to fight? They don't seem to be pushing me so far, so I don't think I have to fight too hard.

　That's what I said.
　Relieu, who came with us in the sense of support for the Lays, would have liked to be excused from dealing with powerful enemies like snakes in this lake, even if they were monsters around there like goblins.
　In the first place, this dungeon had just been made, and even for the boss who was protecting the core of the dungeon, it should have been a pretty weak monster.
　However, if you actually enter this dungeon, you will find that the first floor has a certain level of predictable Y-paths, and there is a mysterious existence -- rock plants -- but if you go upstairs, there is a vast forest.
　It wasn't a dungeon that just made it look like a dungeon.
　And down the steps in the forest, you will find a vast space, which is full of the same rocky plants that existed on the ground floor... and finally arrived at this subterranean lake.
　The huge snake in front of the Relues is not the kind of person in a dungeon that has just been built.
　That seemed to me to have enough power to see if Lerieu could win until he really hard.
　That's why I suggested that you don't have to force yourself to fight with such opponents, but... unfortunately, that theory didn't apply to Ray and his friends.
　Vichela wants to fight against a strong enemy...and above all, Ray wants the magical stone of an unknown monster.
　There are not enough magical stones of unknown monsters, as they are reinforced by the magic of animals.
　And most importantly...

"Look, Relieu,"

　When Ray said so, he pointed to the bottom of the lake.
　Such a bottom may not normally be seen, but this lake is covered with luminating moss.
　I was also able to see the bottom of the subterranean lake at a considerable depth.
　Yes, even the core of a dungeon at the bottom of a subterranean lake.