After some careful discussion, it was finally decided to enter the secret passage to explore, and I believe that with the strength of the three of them, it is unlikely that they will be injured by the monsters of this underground world. The strongest monster in the underground world is the death knight, and now Li Yunfei can single-handedly pick up that goods, and the cooperation of the three of them is simply a hanging.

Linnie controls the little dryad to open the way in front, Amy is responsible for breaking the back, Li Yunfei responds to emergencies, and if you encounter the troops, you can directly pick up the two girls and flash away from the battlefield.

The passage was unexpectedly long and the three of them continued to advance for more than ten hours, the speed was quite fast, at least five hundred kilometers away, the passage had already been out of the enchantment range of the underground world, but there was still no end in sight, but this passage was getting more and more spacious, from the original more than one meter wide, to a passage of nearly ten meters long and wide. It's hard to imagine what made such a long and spacious passage, and what this passage was for, people are a little puzzled.

The possibility of finding that set of refined equipment is getting smaller and smaller, but since they have been walking for so long, they can't give up halfway, so they continue to walk forward, and the mood of the three of them is still quite good, and the rancid smell unique to the underground world has finally disappeared.

The way of rushing has also changed, a rattan ball wraps three people, and then the stone giant holds the rattan ball, striding forward, although the speed is slower than the three of them hurrying themselves, but this way is comfortable to hurry, after a long time of practice and upgrading, now Linni controls the stone giant with the three people to rush without personal control, only need to provide enough mental support for a command, and it is quite chic to rush up.

Li Yunfei really likes this way of traveling, enjoying it at the imperial level, leaning on the comfortable rattan chair, holding the beauty, explaining the knowledge of the formation, and feeling the adoring gaze of the two elves, which is quite enjoyable.

……

Before I knew it, another whole day had passed, and after a whole day of rushing, Linni's mental power had finally been consumed by more than half, so when he was about to rest, Li Yunfei quickly took out a large wooden barrel, filled it with water, and heated it with the fireball, and gave Linni a hot bath to relieve her fatigue.

This kind of thing has been done for more than a month, in fact, the most important purpose is to hold Linnie's white and tender body when resting at night after taking a bath, it will feel comfortable, of course, under normal circumstances, Linny will also invite Amy to take a bath together, and Li Yunfei will be responsible for guarding around, and then after the two of them take a bath, they will change their vigilance, and Li Yunfei will also take a bath.

It is said that every time the two beauties take a bath, take off those equipment and enter the big wooden barrel naked, Li Yunfei suddenly can't tell who is who between the two of them. When the two don't wear clothes, they are almost exactly the same, and they have known each other for half a year, and they still can't tell the difference between them.

"The captain came over to take a bath together, anyway, it's not strange around, don't be alert!"

"This isn't good, the barrel is too small."

"Is this big barrel small?" Linnie was a little curious, this barrel was more than two meters in diameter and could hold five or six people.

“…… Is the captain afraid of me? Amy said suddenly.

"How so!" Since the two girls didn't mind, of course Li Yunfei didn't have any worries, and went directly into the big wooden barrel, to be honest, when I bought this big wooden barrel, I actually had such a day in my heart, otherwise why only buy one, why do you buy such a big one, why do you still have so much water in the storage space? There are thousands of tons of clean water.

As soon as Li Yunfei entered the barrel, Linni approached Li Yunfei's arms, enjoying Li Yunfei's hands under the water doing some touching and scratching things on her, of course, Linni enjoyed it very much, but Li Yunfei enjoyed it even more...... Amy leaned on the other side, Li Yunfei was not ready to provoke her, but one foot quietly stretched out to his lower body...... This feels really, aren't you worried about being seen by Linnie at all?

With Linnie's strength, of course, she was the first to discover Amy's small movements, but she didn't know anything, in fact, she deliberately asked Amy to do this, Amy had already confessed to her, took over the task of the elders of the clan, and learned the formation knowledge from the captain as much as possible, and now it can be said that she has successfully completed the task.

The captain knows that the two of them are not human races, and he still imparts all kinds of knowledge without reservation, and he does his best to upgrade with the two of them, and he still takes care of him so much, if he can't make the captain more comfortable, it would be too unkind, the elf race is not a race that knows how to repay it, if he doesn't know how to repay, he can't enter the arms of the god of nature......

“…… Linny, what are you thinking? Seeing that Linnie didn't speak for a long time, unlike the usual chattering, Li Yunfei was also a little embarrassed to ask, obviously Amy's small movements had been discovered by Linny, so she should be sulking.

"Well, it's nothing, I just think the captain is very prescient, he actually prepared so much clear water before going to the underground world, and in such an environment, when you are tired every day, you can still soak in the hot spring, it's really comfortable!"

"Yes, yes, the captain is really too thoughtful!" Amy answered, directly breaking the silence, and the three of them chatted naturally, it was this underwater, rubbing feet and legs back and forth, which was really exciting.

The three of them were happily soaking in the hot bath, and the small tree medicine seemed to be very active all around, and the roots were rooted in the underground of the passage to absorb a large amount of nutrients, and at the same time transmit all kinds of collected information to Linni.

"There is the breath of the sea, could this passage lead to the endless sea?" Feeling the message from the little dryad, Linny muttered to herself.

"Impossible, the distance between the Endless Sea and the underground world is five thousand kilometers, how can such a long passage be made......" Amy said with certainty.

"Well, I don't think it's likely, the monsters there are very powerful, if we do get there, we will be in big trouble!" Linnie also thought it was unlikely.

"Don't worry, don't worry, even if we really get to the Endless Sea, we can still run away if we can't defeat those monsters, if you want to talk about the means of escaping and saving your lives, the three of us are still very powerful."

"Of course, the flash of the captain is simply the world's number one life-saving stunt." Amy said much closer.

"When I collect enough blessed gems and refine enough magic materials, I will make a similar set of equipment for all of you!" Li Yunfei generously promised that as long as there were materials, it would not be difficult for Li Yunfei to make a short-distance space jump armor.

"That's what you said, don't go back." Linnie turned around and said seriously.

"Of course I won't regret it, as long as there are enough blessings and blessings to refine the magic guide materials, I will definitely be able to teleport the equipment in space...... In fact, as long as you study those basic formations well, you can even make corresponding space teleportation equipment by yourself in the future, and you can also make many equipment with different functions! Li Yunfei replied very seriously.

"Thank you, we will definitely go the extra mile!"

"The captain is fine now anyway, why don't you tell us about the formation knowledge anymore!" Amy hugged Li Yunfei's arm affectionately and said.

It's just that he is not wearing anything on his body now, but this hug made Li Yunfei stunned for a moment, and this arm completely fell into the ditch between the twin peaks of this elf sister, isn't this not good?

What made Li Yunfei even more surprised was that Linnie also hugged her arm like Amy, and neither of them noticed that there was anything wrong with this, in fact, in the cognition of most elves, they really didn't think there was anything wrong with it.

"Alright, now I'll introduce you to the specific functions of the twenty-fifth basic circuit...... It is said that the only function of this basic circuit is to diffuse energy, just like the heat of this fireball, the energy radiates out to the surroundings...... "Li Yunfei directly took out an energy basic circuit and began to explain, as long as you really understand dozens of basic energy circuits, then you can borrow these basic energy circuits to form countless formations, as for how many formations can be formed, Li Yunfei can't say.

In principle, it should be infinite, just as a simple analogy can form many words, but many words can be written into countless sentences, and countless sentences can also evolve into articles......

Of course, at this stage, Li Yunfei's formation is still in the stage of composing words, as for sentences, articles, and the like, it is still quite a distant thing, but one thing is certain, this formation system has unlimited development potential, and even can eventually borrow a huge and complex basic circuit to pile up a real avenue, if you really write a avenue, it will be really invincible......