Arriving on the second basement floor, Charles and Valen were startled by the sudden emptiness and brightness.

This is a relatively spacious venue, and there are many corridors around this venue, but there are three corridors in front of it, four corridors on the left and right, and this location is a bit like a public spot.

"Charles, is this... Investigate them all?" Valen looked at the many corridors in front of him in amazement, so bright but still without end... Before Valen could begin to investigate, his heart was tired.

"Of course, what else can we do? After all, we're stuck here, with only two days of food and water, and we'll starve to death if we can't find our way out. Charles looked around and said, "But I think it's better for the two of us to be on the safe side." ”

"Don't, don't, let's separate, as you just said, we have two days of food left, and if it takes so much time, the food may not be able to support it at all. Valen said, pointing to the left, "I'm going to explore the four corridors on the left." He turned around and left.

Charles instructed to be careful and didn't say anything else, what Valen said was exactly why he didn't catch up, raised his foot and turned to the right, his eyes turned down, he lowered his body in confusion and picked up a crumb of something, it was slightly sticky to the touch, it seemed to be a grain crop, and there were two keys hanging on the left and right sides of the stairs, why hang in such a place?

"This place... Is there food, is there a door?" Charles got up and entered to the right, confused.

Entering the corridor, Charles was stunned by the length and accessibility of the corridor. These four roads are not a road to the end, but intertwined with each other, if you guess correctly, the three roads near the middle are all connected, which means that this underground is a maze of intersection!

Each of the structures embedded in the wall is very simple, a bed, a bedside table, and a large chest with a lot of miscellaneous items. But every room here was very messy, and a lot of things fell on the floor, and of course, Charles himself didn't know what they were for.

Basically, all the rooms are the same, the situation is very similar, and the exits of the four corridors at the end of the road lead to a narrow corridor, and turn left into the side corridor.

The situation inside was exactly the same, and he was surprised to find some dry food that he hadn't taken away, Charles was not surprised to find dry food, but the dry food wasn't moldy yet, which means that there were people here at least three days ago, and the food fell on the ground and walked in a hurry. Why? What made them so in such a hurry?

When I walked out of the second corridor and saw that Valen on the other side was in the same situation as me, did I say that the structure of the corridor was really the same?

"Valen, what's going on over there?" called Charles. Valen told Charles about the situation on his side, and Charles nodded and shouted, "Same on my side." ”

Saying that, the two of them entered the third corridor again at the same time, and checked the remaining two corridors, and the results were exactly the same.

The two of them sat on the ground tiredly, looking at the three Yongdao in front of them, if the three Yongdao in front of them were still the same, it was really Jedi.

The two of them rested for a while, and began to investigate again left and right, and the results were finally different, the two just entered the first room and ran out one after another, staring at the other party who poked their heads out at the same time, and said in unison: "Come here, there are good things!"

The two of them were amused, and Charles smiled: "You say it first." ”

Valen nodded excitedly: "There are a lot of strange-shaped crystal products in this room on my side, and there are a lot of colorful liquids in many crystal bottles, and there is a large stove, although it is no longer on fire, but from the perspective of structure, it is used to heat these utensils." ”

Charles listened and said, "I'm about the same as yours here." "It's not bad, and the Yongdao is the same as the four Yongdao, but the Yongdao in the middle is independent, which makes Charles look forward to it slightly, after all, isn't it independent to represent the special of the middle Yongdao, maybe it's the place to leave.

Charles and Valen began to investigate room by room again, each room was three times the size of the single bedroom just now, and it was filled with a very uncomfortable smell, but Charles had smelled the liquid in every bottle, and there was no smell in the air, Charles guessed that it might have been heated, but it was only speculation.

"This is..." Charles picked up the two bottles of liquid in the corner, his eyes flickered a little uncertainly, he shook slightly to look at the luster and viscosity of the liquid, put it under his nose and sniffed it gently, similar to what was written in the worn-out book.

"That's right, this is explosives. Charles said with certainty, according to the book, once these two liquids come into contact with each other, they will explode after all, so the alchemist will put a unique liquid to neutralize, so that the two liquids do not react, and only when the explosives collide violently, the explosion will occur, although it is life-threatening, but the power is huge, so many guild teams carry it.

Although the composition of the explosives was basically understood, the alchemist of that special liquid had never said it.

Charles looked at an extremely viscous liquid next to him, milky white, probably an adhesive, and said that the adhesion and rapidity were much stronger than ordinary people's paste, and the price was also very low.

"Is this the alchemist's experimental base?" Charles could only guess like this, otherwise it would be impossible for such a large amount of equipment and materials that only alchemists would need, but this made Charles even more confused, the status of alchemists is not high, but it does not mean that they are unsightly, he and Valen have fallen a long distance to get here, such a terrifying secret, Charles feels that he smells danger.

There is also a strange very small and pointed thing, which is hollow in the middle, and where the point is found, a similar thing is an embroidery needle.

Charles walked to the end, there was a door at the end that could not be opened, and there were carvings in the shape of four wine cups protruding from the door, nothing else, and all the rooms were examined, and the closest door to the door could not be opened There were two chests made of royal sand, with a keyhole on it, if I guessed correctly, it should have something to do with the four keys hanging on the stairs, and the messiness of the table fully showed that these people had left in a hurry.

Charles leaned against the wall and waited for Valen to come out.

"Varen, how's that?" Charles asked, looking at a horrified Varen coming out.

"Charles, you know, I've seen something I've never seen before, it's that crystals can be so twisted······ Valen said incoherently, unable to find an adjective, but could only use his hand to gestur.

"So Valen, do you have these things over there? Charles said the box and the door that wouldn't open.

Valen shook his head: "I only have that box on my side, and there is no door that can't be opened." Charles, do you think we should open the box and take a look, in case there is any treasure inside?"

"No, just leave. Charles flatly rejected Valen's offer, Charles didn't want to have anything to do with anything here, and left as soon as he could.

Valen nodded disappointedly, Valen, who was accustomed to listening to Charles's words, acquiesced in Charles's decision to be the best choice.

The two didn't stop, and walked directly to the middle of the road, sure enough, there was no fork in the road, just a passage, but what made the two uneasy was the downward staircase.

Suppose the distance between the two of them is ten meters, and a staircase is seven meters, then this staircase is also seven meters, standing in front of a gate, which is already twenty-seven meters above the ground!

The gate is also made of the strongest royal sand, with four recessed squares on it, from which some inexplicable zigzag lines emanate outward.

Valen looked at Charles, and Charles smiled bitterly: "If I guessed correctly, now we need to go back, use the four keys to open the four boxes, and then take out the contents to open the door that I said was not opened, and the key to open this door is probably inside." ”

"Wouldn't it?!!, isn't it inside those two boxes?" asked Valen.

"The alchemist's personality is extremely precise because of the need for experiments, and his personality is mostly cautious, if he can open it with a key just by putting it in a box, then wouldn't it be a superfluous move to put four chests? The key was supposed to be placed at the staircase so that everyone knew who had taken it, and as for why it was divided into four chests, it must have something to do with the carving of the four wine cups on the door. Charles guessed.

Valen thought speechlessly: Open the box, everything is clear, what are you doing so much.

The two men walked to the box with the keys on the left and right sides, opened them one by one, and what they got when they opened it can be said that it was both unexpected and expected by Charles.

Valen walked up to Charles with a strange face, carrying two crystal bottles of liquid of different colors, and then looked at Charles, Charles smiled slightly, shook the two crystal bottles in his hand in front of Valen, and said with a smile: "Now you understand the source of the wine cup, right?"

Valen smiled, but laughing was a little more ugly than crying: "But how did the door open?!"