The entrance to the secret passage has been open for two days, and although a large amount of air has poured in from the entrance, the ventilation system of the secret passage has been destroyed, so even if there is a large amount of air pouring in, it only slightly neutralizes the turbid air before, and its effect is not much better.

When Yun Tian and the others entered, they had already drunk three different potions: heartbeat slowing medicine, breathing slowing medicine, and air filtering medicine.

The first two of these three flasks must be used together to have an effect, and the effect is that the player can enter a pseudo-suspended animation state, which minimizes the need for oxygen, but is not completely immune. These two bottles of respirators are generally sold in tandem, and the price is much more expensive than the undersea respiratory, after all, the use of undersea respirators is relatively limited, and can only be used in waters, unlike heartbeat and breathing slowing agents, which are suitable for any terrain - high mountains, underground and other places where it is difficult to breathe can be used, but it cannot be used in waters.

Air Filtration Elixirs, on the other hand, are rarely used by alchemists, as their effect only allows the player to filter out some bad gases. However, if the effect of these gases is relatively strong, they cannot be filtered, and there is the same as not, so naturally no player will use this potion.

But Yun Tian was different, he asked the guild's alchemists to make a batch of air filtration potions. Although the effect of the air filtration elixir is very small, but Yun Tian knows a secret of this elixir, this kind of elixir belongs to the real auxiliary medicine, the effect of a single one is very low, but if it is used with other special alchemy elixirs, then the effect is outstanding.

For example, if you mix an air filter with an antitoxin agent, you can pass through a swamp full of toxic miasma. And now Yun Tian mixes this medicine with breathing and heartbeat slowing agents, then its effect is naturally stronger, as long as it is within the effect time, Yun Tian and the others can completely ignore the turbid air in the secret passage, and even if there is any special abnormal state of gas, it will not attack immediately, but there will be a prompt on the status bar, which is more convenient for Yun Tian and others to lift the state.

The smell in the secret passage is not good, except for the smell of decay, there is also a very strong bloody smell. According to normal logic, the exit of the secret passage has been open for two days, and the bloody gas will at least be much lighter, but the smell here is very strong, and there is even a smell of gas.

"Hey, here...... Can't you use fire-based magic? Akiba's brow furrowed.

The air filter only filters out some impurities in the air, but the smell does not change in the slightest.

Since experiencing many situations of fire incompetence, Akiba has learned about the situation where fire mages are unable to exert their effects. At this moment, when he went to the secret passage, after smelling something wrong, Qiu Yeyan's face immediately changed, if it was really as he guessed, then the fate of using the fire skill here would definitely be very good-looking.

"Why don't you give it a try?" Armstrong asked.

"I don't care." Akiba shrugged his shoulders, he checked his list of skills, the skills on it were not grayed out, and they were obviously usable, "The worst outcome is that everyone will die together." ”

"Uh......" Hearing Akiba say this, everyone remembered a question.

In a place as narrow and full of miasma as the secret passage, a little fire will produce a big explosion...... "It's okay, this secret passage is very strong." Butterfly Blue reached out and hammered the brackets on both sides of the secret passage, this kind of metal bracket was unseen by everyone, "Even if there is a big explosion here, the secret passage will not collapse." ”

"Who cares if the secret passage will collapse!" Yun Tian cursed, and after a moment, he changed his words, "That's not right...... It won't do us any good if this secret passage collapses. We've been preparing for so long, Yezi, you give me honesty, you don't need your contribution here, just stand and watch the show. ”

"Damn!" Autumn leaves were depressed, "It's easy for me to play a fire method!" When I went to the sea, I didn't have my share, and now I don't even have my share in the next secret passage......"

"We're here for your good." The fingerclasp clasped and patted Qiu Yeyan's shoulder, "If you blow up this secret passage with a magic, wouldn't it be a sinner for the ages?" You know, everyone knows each other so well, even if this secret passage blew up, we wouldn't blame you, but you'd definitely have a bad conscience, right? So, you'd better watch the play on the sidelines. ”

"If this secret passage really explodes, it's no wonder if you don't peel me off a layer of skin." Qiu Ye muttered quietly, "Especially you guy, I'm more troublesome when I'm offline." ”

"What did you just say?" The finger clasp that was walking in front suddenly turned his head and asked with a smile, "I seem to have heard something." ”

"What?" Autumn leaves were dazed.

"I think I heard someone say they're going to treat me to a big dinner." The fingerclasp continued to smile.

“…… Be! Banquet! Akiba nodded in humiliation.

As for the problem of the two of them, everyone in the elite group has become commonplace, and even occasionally blackmails the two. After all, the two of them are friends in reality, and they rent a house together, and whoever complains can immediately come to the door to settle accounts, and the situation at this moment is obviously that everyone has no chance to intervene to get benefits, so naturally no one interjects.

It's just that when everyone wanted to move forward, they found that Yun Tian was squatting on the side and knocking on the walls on both sides of the secret passage, and the expression on his face was very solemn.

Everyone was very convinced of Yun Tian's ability, since Yun Tian was banging on the wall here with a dignified and serious face, everyone immediately thought of some situations: There is a secret passage in this secret passage!

You know, this secret passage is also Yun Tian brought everyone here, and Yun Tian's performance has always been obviously a little dehumanized, and his understanding of the game is completely the kind that goes deep into the bone marrow, so at this moment Yun Tian is knocking on the wall, obviously there is some mechanism. After everyone glanced at each other, they didn't need to explain to Yuntian, and everyone was banging on the wall by themselves.

The construction of this secret passage can be considered luxurious, and its spaciousness is at least enough for ten heavily armored knights to walk side by side, and even to fight; Moreover, the height of the secret passage is also nearly four meters, which is enough to summon some puppet mechanical creatures that are not too tall to fight here. Moreover, the floor of this secret passage is all paved with white light stones, which have no special purpose, but where there is a light source, they emit a soft light.

In addition to these, the walls and ceilings on both sides of the secret passage are paved with an unknown metal that does not feel cold to the touch, and even has a warm feeling. However, when you knock it with your hand, it will not make a hard sound unique to metal, but on the contrary, it will only make an extremely subtle rustling sound, which gives people a very strange feeling.

There was no water in the sea, and the tomahawk tried to slash it, and a few sparks splattered on the wall, which looked unusually bright in the reflection of the white stone floor, but there were no scratches on the metal wall, and the tomahawk did not make any harsh sound when it was cut just now, only that the rustling sound was slightly louder.

"What hard metal!" The sea is without water, and he said a little distractedly, "The metal of these brackets is the same material as the metal of the walls. ”

There will be a bracket at intervals in the secret passage, and this bracket is used to support the dome of the entire secret passage, after all, this secret passage is obviously excavated manually, and this excavation method is no different from the general mine tunnel, so there are these brackets. It's just that there is a torch hole in each bracket, and there is still a torch on it, but it is not lit.

At this time, who would dare to light these torches?

As if disturbed by the firelight, Yun Tian suddenly turned his head and looked at the place where the firelight had lit up just now.

Everyone drank the Dark Vision Elixir, so no matter how dark this secret passage was, it was nothing to everyone.

When Yun Tian turned his head, he happened to see a group of people from the elite group banging on the wall, and the expressions on their faces were very serious, everyone was banging here, groping there, or simply pressing hard. Everyone was separated by a distance from each other, and as they fumbled, they gradually moved to the right.

"Did you find anything?" Ahh

"Nope." The crowd shook their heads.

"The metal is laid very delicately, and the usual way of exploring it doesn't work at all." The sea shook his head without water, "I didn't find any gaps, this laying technique is too clever." ”

"Me too." The crowd shook their heads again.

Exploring secret passages is generally judged by the echo from knocking on the wall. However, this method is not the only one, because many dark tunnels will use thicker walls to prevent echoes, but in this way, the dark tunnels are naturally extremely heavy, and conventional means must not be able to open, so trigger mechanisms are needed to activate and close. It's just that at this moment, no matter how much everyone looks, they can't find these mechanisms, and the special surname of the metal wall puts an end to the possible surname of the echo.

"What are you doing?" Seeing that everyone was busy, Yun Tian asked curiously.

It's okay that he didn't ask about this, but when he asked, everyone was dumbfounded.

"What are you doing?" Passing by was the first to react and asked.

"I'm wondering if I can pry all this metal away and take it back to the Void Fortress to build ......"

"it!"

(To be continued)