(Without warning, I'm ready for two more, and friends who have passed by ask for collections and recommendations.) It's the last few days of the new book list, so let's give me a gorgeous curtain call. ）

"You have two bags tied behind your back. Pannis pointed to Gastin's back and said, "One of them was Rachel's one you took with you when you left, right?"

"It's Rachel's, but I picked it up when I was looking for her later. Gasteen said with a smile, "I thought she would be useful, so I put it on my back." ”

"That's just right. Pannis didn't pursue much: "Put on the waterproof leather clothes, and finally check whether the fire attribute crystals have been replaced with new ones, and then check whether the rope around the waist is firmly tied, I don't want to go into the water and get separated and find someone one by one." Also, Lina, don't struggle and don't open your eyes after you get into the water, we'll drag you away, you drink the underwater breathing potion, just breathe normally, alas, it's not for you not to open your eyes now, you don't have to close your eyes now, right? Vivian, are you sure you have enough ingredients for the underwater breathing potion? Are you sure you can get it again?"

"I've got six more bottles. Vivian took out a blue potion bottle and shook it: "Don't worry, don't talk to the eldest sister." ”

"Okay. Pannis nodded: "It's all right, we're ready to go into the water." ”

"Wait. Catherine stood in front of the ice cave and hesitated: "Let's all go down, what if it's freezing here?"

"It doesn't matter. When I came back, I came first and chiseled this place. Let's go in for a maximum of three days, and if we can't find it for three days, we have to go back first to resupply. In three days, it won't freeze too strong here, and you can chisel it again with a little effort, don't worry. Pannis, who had been prepared for it, explained.

"That's good. Catherine said she was fine.

"Then, as agreed before, I'll go first, Catherine, you go last, okay, let's go. Giving the order to go, Pannis jumped into the ice cave first, making a splash.

The water under the ice was as dark as ever. Because of the barrier of water, the already not very bright light above the heads of several people became even more blurred, and it was difficult to see clearly from a distance of one meter. In this environment, only those with advanced exploration skills can advance and retreat freely, and even if others have strong strength, it is difficult for them to play a role.

At this time, Pannis, the only person who could play a role, undoubtedly swam in the front to lead the way, and the dark environment could not cause him any trouble, and swam straight to the hole in his memory. Lina obediently closed her eyes and remained motionless, letting the rope around her waist pull her, floating behind Pannis, who led her forward. Vivian, who is in third place, doesn't seem to be very good at swimming, but she is stronger than Lina and is not afraid of water. Rachel followed Vivien closely, very close, trying his best to distance himself from Gasteen behind him, and his eyes often glanced behind him with a slight uneasiness. And Gastin, who was behind him, sped up several times to get closer to Rachel, but was pulled back by Catherine, who was second only to Pennis in the last water. The six men wore a long line and slowly approached the entrance of the institute under the leadership of Pannis.

"Goo-go Feeling the silence around her, Lina, who secretly opened her eyes, saw the first thing she saw was the entrance to the dark research institute hole, and as soon as she opened her mouth to say something, she was poured into a few mouthfuls of cold lake water, and in a panic, she completely forgot the previous reminder from Pannis, subconsciously closed her eyes, held her breath, and waved and struggled with her hands and feet. In a panic, she suddenly felt someone grab her waving arm from behind the side, and then directly clamped her body with her arm, and swam forward with her. Lina, who quickly regained her composure, knew that it was Pannis who saw that something was wrong and turned back to save her, so she patted Pannis's body and signaled that he had recovered and could let go.

A few people slowly swam out of a distance of more than 2,000 meters, through the long underwater tunnel, you can clearly feel that as the ramp rises, the water is getting shallower and shallower, until finally standing on the bottom of the water can expose the water.

"Whew. Standing in chest-deep water, Pannis, who was still floating straight in the water, pulled Lina to her feet, turned around and waited for the rest of the people to gather around him. When the others saw Pannisy stop and stand up, they all changed their positions and stood in the water.

Only Vivien, after jumping out of the water and shouting "Go further", fell back into the water, and the surface of the water was completely above her head.

Pannis shook his head and smiled, and led the way forward for more than a hundred meters, and only stopped again when he saw that the water had lowered to his waist. Vivien finally managed to put her head out of the water, and while wiping the water on her face, she muttered angrily, "It's too much, it's so annoying to ignore me like this." ”

Catherine followed and patted Vivien on the head to soothe her, looking around at the walls of the tunnel, which were apparently made of artificially made stone, "Is this the periphery of the Institute?"

"Not sure, I didn't have time to get up there. "But this should be it," said Pannis, "unless there are other people who are mentally ill to build buildings in such a place." ”

"I finally found it. Catherine let out a long breath and smiled strangely: "One hundred thousand gold coins, I'm here!"

Ignoring Catherine's old problem, Pannis said to the others: "There is a ten-meter-deep shaft ahead, and I will climb up the ladder first in a while, and you will climb up one by one." ”

"Use my ladder. Vivien handed over a telescopic ladder half a meter long: "The maximum height is fifteen meters." ”

"Okay", Pannis took the ladder, remembered to walk more than a hundred meters, completely left the water, stood on the dry ground and untied the rope around his waist, took off the waterproof suit outside, and then came to the bottom of the shaft, pulled the winch of the ladder and turned it hard. As the winch turns, the telescopic ladder slowly rises.

Taking advantage of the time when Pannith was going to erect the escalator, Gasteen approached Rachel with a flattering smile and wanted to say something, but Rachel gave him a cold look and turned away from him. Gastin, who wanted to keep up again, suddenly heard Catherine cough heavily, and had to stop the harassing behavior.

"Alright, you can come over. The awkwardness of the scene was defused by Pannis's shouts ahead, and Rachel was the first to rush to Pannis's side, looking up from the patio.

"Hey, there's lights. Rachel looked up at Pannith as he climbed up and saw the bright lights outside the patio, and said in surprise, "How is it possible, how can the institute from hundreds of years ago still shine?"

"That's the hallmark of Magic Channel. Vivian, who walked side by side with Lina, explained: "Unlike Crystal Technology's energy source, which comes entirely from hedrons, as long as the energy is maintained and the magic pipes are not damaged, the lights used for lighting will never go out, so this may be just a mage tower with a changed structure."

"Never extinguished? Doesn't that mean it can be used for thousands of years?" Rachel usually didn't have much contact with magic technology, and was a little curious at this time.

"Impossible. Vivian smiled and explained in detail: "It depends on the situation, here it should be to use the leylines to absorb the energy of the ice and convert it into non-attribute magic energy to activate various magic circles." Don't forget, man-made magic power transmission pipes can be damaged naturally, and even if the leyline drawing circle is engraved on the Mithril magic disk, it will fail after a few hundred years, and it is not easy to support it here for six or seven hundred years. ”

"Let's come up first and continue chatting. Pannis had already climbed out of the patio, revealing only one head from the outside: "It's safe up there, and it's warm." ”

"Let's go. Catherine, who came over at last, just heard it and smiled at Rachel, "You go up first." ”

"Thank you. Rachel gave Gasteen an unnatural look before ascending the telescopic ladder.

Outside of the patio and the rest of the lower caverns, they are two worlds. As soon as you get out of the patio, there is a long corridor, in other places, such a passage must be pitch black, and the four walls are all irregular rocks, but the corridor here, the four walls are all paved with rocks neatly, and the top of the corridor is carved with a small magic circle every ten meters, which is powered by the magic channel hidden behind the rock, ensuring that all the small magic circles are full of energy. More than twenty centimeters at the lower end of each small magic circle, there was a white ball of light hovering, and the light emitted lit up the entire corridor, bright, but not dazzling.

"Sure enough, this is a different mage tower. Vivien looked up at the light overhead as she walked: "This is the most commonly used lighting circle in the mage tower, there should be a constant temperature circle in the dark, that's why it's so warm here." ”

"You mages are really a bunch of lazy people who love to enjoy. Lina said with some envy: "The living conditions alone have to be so good." ”

"This kind of full-featured mage tower can only be built if you find the overflow point of the leyline energy and have the strength to occupy it, otherwise you can only build those simple versions, and the scattered mana collected every day is not enough for the minimum consumption of daily operations, how can there be extra energy to supply these things like constant temperature lighting. ”

"Looks like we've come to the right place. Pannis looked back and said, "This is supposed to be the underground research institute." ”

"Can't be wrong. Vivien replied affirmatively, "There's no better place to study magic potions than in the Mage's Tower, so the instruments can be used regardless of the energy consumption...... Well, you see, the one in front of you should be the gate. ”

Hearing this, Pannis turned his gaze back to the end of the corridor ahead, where a metal gate more than four meters wide was erected. After hundreds of years, the paint on the gate has completely peeled off, and mottled rust covers the surface of the gate.

"Can such a rusted gate still work?" asked Pannis, somewhat uncertain.

"I don't know, let's try it. Vivien knew that from here on, she would be the main one who played a role, so she hurried a few steps forward and leaned in front of the gate to take a closer look. After looking at it for a long time, he said with a smile: "I see, this is the most ordinary metal door, and there is nothing special except for the invalid guard circle on the door." Of course, there may be a guard circle inside the door, but you can't see it from here. So, please open the door in the normal way. ”