The sleek pale stone bricks gradually turned into the appearance of the floor under the diffusion of faint light, and gradually dispersed in front of Duan Qing and the others, and the ancient and decaying feeling was also slowly revealed in this vast space that seemed to have not been invaded for a long time with the cracks that gradually appeared on these floor bricks. The corpse of an imaginary dragon did not appear under the light raised by Fu Yan's hand, and Duan Qing, whose nerves were suddenly tense, let out a long breath after a long while, and then his gaze showed a little doubt, and looked towards the depths of the space illuminated by the light source: "This place ......"

"This place doesn't look like an ordinary underground passageway."

As the field of vision expanded, some artificial creations began to gradually appear around the space, and the empty frames that looked like they were used for posting and decoration also appeared on the wall at the end of the corner with the brightness of the light, and from time to time some words and languages that Duan Qing could not understand were marking something. Rows of seats appeared at the bottom of the corners of the walls, covered with dust and signs of decay that clearly showed the fact that they had not been used for a long time, and three or two clay pots and stands of unknown purpose also appeared in an irregular manner between the decaying seats, proving in an empty way that the space had been dilapidated for thousands of years: "There is nothing here. ”

"Or rather, everything that once existed here is gone."

Reaching out and touching the dust on the metal frame in front of him, Duan Qing's eyes flashed a little embarrassed; "It's the same as the village deep in the Emerald Forest that I visited, and after too much time, all the items on it have been weathered."

"There's still moving air in this place."

His gaze turned to the depths of the space that the pale light could not illuminate, and Ning Lan, who was also carefully investigating the nearby code, then reminded in a low voice: "There should be some place that circulates with the outside world. ”

"Perhaps, or maybe it's the air circulation that the huge space has formed by itself." Pointing to the dilapidated tables and chairs in front of him, Duan Qing shook his head and replied, "And judging from these furnishings, this is not an ordinary place in the first place. ”

"This shape with seat cushion and backrest...... Ning Lan seems to have seen it somewhere. The code whisper Ning Lan, who squatted down, said cautiously: "Is it the kind of seat that was specially used for people to rest a century ago?" ”

"That's what you say." His eyes suddenly became sharp, and Duan Qing looked up at a transparent sign that appeared above the wall where the seat was located: "It's a pity that we don't have any way to confirm this, we can use it to prove it."

"Probably only the ashes in front of us."

He reached out and scooped out some of the unfinished fragments that had been scattered between the metal shelves, and then, after a moment of thoughtful observation, slowly placed the fragments on the mage disc in his hand. The earth-based magic gem that should have existed in the center of this magician disc had also disappeared at this time, and the center of the groove that absorbed this fragment then also shone with a blue-white light, and the prompt sound from the system then sounded in his ears with Duan Qing's eyes gradually widening.

[A new inlay has been detected.] 】

[Analysis and verification: earth element concentration 16.4%, fire element concentration 11.3%, wind element concentration 9.8%, water element concentration 12.5%]

[Test Result: Low-grade Lukarn Crystal.] 】

[The energy level is too low to obtain the corresponding skill.] 】

“…… I've never heard of a name. ”

Looking at the surface of the broken crystal that was so transparent that it was a little pale, Duan Qing shook his head with understanding: "But to be able to identify the name of this unknown crystal, my understanding of this ancient disc is one step higher." ”

"Maybe it's because the crystal is so small." The secret whisper Ning Lan shook her head: "If you can keep a larger fragment, maybe you can use it for Mr." ”

"I didn't put this crystal on it just to use it." Removing the fragment from the disc, Duan Qing replied helplessly: "I just want to find out the content of this crystal fragment to prove the origin of this place, but it's a pity that ......"

"The mystery seems to be getting bigger." His gaze wandered over the edge of the light as far as his eye could see, trying to find more clues available: "If it doesn't work, then we can only rely on this temporary ally of ours." ”

“…… I have to praise you adventurers for their abilities. ”

It was as if she had recovered from a sluggish state, and the dragon woman Fura who had been standing next to her without saying a word only made her voice at this time, and her golden eyes were also retracted from the walls on the upper edge of those rays at this time, and slowly fell on the faces of Duan Qing and the others: "You can find so many clues in a short period of time, and your wisdom really amazes me." ”

"Presumably Ms. Fura already has the answer." It seemed that he was aware of the unwavering emotion in the other party's words, and Duan Qing's face did not show any look of joy after being praised: "Do you know this place?" ”

"If I knew this place, my people and I wouldn't have spent so much time searching." Slowly taking two steps forward, Fura raised her arm, which still shimmered slightly, into the air: "But ......"

"I still know the words written on it."

The swaying light wrapped around his arms suddenly magnified in front of the two people, illuminating the darkness in front of Duan Qing for a moment, and a boxy hall was then displayed in front of the two mortals with the extension of this undazzling light. The huge tunnel appeared on the opposite side of their location as the view cleared, swallowing up the endless darkness with rail-like objects hanging in the air, and the rails showed each other in three or two vertical depressions, showing them the style of the era in the form of a platform that could only be displayed by another tech tree: "This, this is"

"As you can see, this should be something like the kind of train you use in the outside world."

The gentle light slowly faded in front of Duan Qing, and Fula, who was facing away from them, also put away her slender arms raised high, and the gorgeous golden robe that appeared in front of them at that moment also disappeared in Duan Qing's eyes with the disappearance of the light at this time, accompanied by her movement of turning around and walking in a certain direction: "This may be a transit station, or a terminal station." ”

"Looks like the core magic array should be here." Regained the depths of the darkness, and then her low murmur rang out, "Hmm...... Has the magic been completely depleted? Then I can only temporarily recharge it with my strength. ”

"What"

The humming sound of magic vibration then interrupted the doubt that Duan Qing was about to raise, accompanied by the tracks of magic that suddenly emanated from the depths of darkness, and then the bright tracks like circuits unfolded along the square walls like the magic arrays that Duan Qing had seen before he fell, and finally converged with each other behind the two of them. The sound of mechanical vibrations and the activation of magical devices then appeared around the hall one after another, filling the hall with a slowly lit white light, temporarily breaking the silence and darkness, and then weaving back and forth as if it had long since gone, and finally gathering into incomprehensible words in the boxes between the walls: "...... What is this, billboard? ”

"No, that's not a billboard."

Walking in front of Duan Qing and the two of them again, the corners of the dragon girl's mouth curled slightly: "Do you really not understand these words?" This is what Tania's ancestors, the Tadaya clan, used to use, yes. ”

"Forget you're an Imperial." As if remembering something, the dragon girl then turned her body: "Then let me tell you what is written on it." ”

"What is it?"

"Metro Line 4."

The voice said the answer indifferently, and the golden figure named Fura then walked slowly to the platform at the end of the tracks, and then silently stopped talking as if waiting for something there. Glancing at the wall behind him where the transparent cards that had turned into arrows were located, the gazes in Duan Qing and Secret Ning Lan's eyes became more and more surprised, and they looked back and forth at the abandoned tables, chairs, and metal shelves that they had investigated before, and only after a while did they let out a sigh: "So this is really a place to rest." ”

"Maybe there were some merchandise or something on top of these shelves......"

"Lukarn Crystal? Is it a commodity to be sold? In other words, in the subway station in the real world, there are indeed some vending machines and other things......"

"And where is the entrance and exit here? Where are the ticket offices? Since it is Line 4, there must be other Line 123, right? ”

"What are you waiting for there?"

The golden figure who was waiting in place finally had a trace of impatience, and suddenly interrupted the low discussion between Duan Qing and Ning Lan: "The subway is coming soon. ”

"What?"

A faint black shadow then slowly appeared at the end of the railroad track in front of him, interrupting Duan Qing's exclamation just now, and several platforms that were so quiet that they were suspended in the air suddenly approached under the hanging rails, and then changed from extreme movement to extreme silence in a way that ordinary people could not imagine, and stopped in front of the platform where Fura was waiting: "This, this is the subway?" Don't even have an iron box and wagons? ”

"Iron box? Wagon? What is that? Slowly ascending to the metal platform in front of her, Fura was full of doubts on her beautiful face, "Are you referring to the trains you use outside?" ”

"I don't know how you made it, but the manufacturing technology of those so-called trains is far from what you have in front of you."

The red and green lights began to flicker back and forth on those shaking platforms, as if to indicate that the suspended subway composed of suspended platforms was about to set off again, and Duan Qing, who glanced at Ning Lan in code, then hurriedly chased after him, and jumped up before these suspended platforms were about to start moving: "That, that...... You know a lot, Ms. Fra. ”

"I've just seen something like this before." Fura, who was still facing the depths of the tunnel, said without looking back, "And the sign over there has instructions written on it, even those who don't understand it will understand." ”

"Since you can even understand the ancient Tadaya language, I'm afraid that your erudition and knowledge are beyond the reach of us mortals in a lifetime, hahahaha." Complimenting the other party awkwardly, Duan Qing, who was squatting on a platform behind, protected Ning Lan and said, "And you even know very well that this train is coming, it's like you've memorized the timetable."

"About this issue...... It's actually quite simple. ”

The red and green light finally began to flicker, and the platform that belonged to the front of Fra's feet finally began to move forward gradually: "Because of the loss of magic. ”

"I just started these subway installations."

The slow movement suddenly accelerated, blocking back the exclamation that Duan Qing was about to let out just now, and the still space from front of him also turned into unbearable wind pressure and struck in front of the two people with the rapid movement of the platform on this railroad track. Tightly grasping the handrail beside him, Duan Qing, who was protecting Ning Lan in code, then used the combined force of the two of them to gradually stabilize each other's bodies that were almost blown away, he looked at the golden silhouette in front of him that was still motionless, and the curse in his heart quickly turned into more questions: "What an anti-human design, did passengers in ancient times have to take such a big risk to take the subway?" ”

"These metal platforms are all depicted with wind magic arrays, which should be used to protect the stability of the platform and the safety of passengers." In the swift sight that swept backwards, the voice belonging to Fura was still slow and clear: "But now I have lost my magic power, so I just didn't activate it." ”

"I see...... Feed! So Duan Qing tried his best to shout: "You've already started the entire subway train, can't you just launch the Protective Magic Array by the way?" ”

"I'm not idle to do anything superfluous."

Different from the whistling sound around her, a low roar belonging to a beast was slowly sounding from the depths of the tunnel where this track was located at this time, and Fura, whose long golden hair did not even move in the slightest, then put her hands behind her back and quietly stared at the scene ahead with golden eyes that Duan Qing could not observe: "Instead of wasting energy on these trivial matters"

"You might as well save some strength to deal with the next danger."