The rest of the dolphins, after hearing Ah Lan's call, first slowly slowed down, and then slowly approached Ah Lan's position at a speed similar to that of a human walking.

"Everyone, take out the vial of purple and blue potion I gave earlier." The purple elixir in Su Yu's mouth is the underwater breathing potion, and the blue one is the isolation barrier potion.

Because everyone has a space bag, so they are hidden in the space bag, after all, once they enter the sea area, these are equivalent to oxygen cylinders in space, which are props for them to continue their lives, once they are gone, then they are gone.

"Remember what I said before, both the underwater breathing agent and the barrier agent are five hours old." This time is actually very long, if the time is too short, not to mention the trouble of drinking the medicine frequently, and it is easy to drown in the sea in the event of an emergency, because you can't replenish the medicine state in time.

"After drinking the underwater breathing potion, a mark will appear on your hand, and when the mark is darkened, it proves that the effect of the medicine is almost gone, and you must replenish it immediately within half an hour." When the imprint is completely gone, it means that the effect of the drug has completely disappeared.

This way of expressing the medicinal effect by means of an imprint was told to Vivian by Su Yu, and it was she who asked Vivian to add a certain herb to the potion that did not affect the efficacy, but after use, there would be special marks, but it would fade over time.

It is inconvenient to see the time at the bottom of the sea, there is no concept of day and night, and there is no clock, so it is very inconvenient to see the time.

Although Su Yu has a system time, she can't guarantee that everyone can always follow her, in case she is not reminded, this is a terrible thing, so this mark must be added.

Su Yu: "There is no imprint hint for the isolation barrier potion, but you can pay attention to the barrier around you, and when you see that the thickness is weakened, close to the state of being as thin as a cicada's wings, it also means that the effect of the medicine is about to disappear." ”

The barrier is essentially a protective shell that makes it difficult for the current to affect their movements, and also insulates them from other forces of nature.

Otherwise, in the deep sea, whether it is pressure or turbulent impulse, in short, the way of death is definitely not only drowning.

But in comparison, the necessity of the isolation barrier is not as strong as the underwater breathing agent, because there is a protective shield inside the mermaid clan, as long as you enter the mermaid clan, the underwater breathing agent must be drunk, but it doesn't matter if you drink the barrier medicine or not.

"One last thing." Su Yu took out a palm-sized stone from his backpack: "This is the Huicheng Stone, the location is in the Sunset Territory, everyone has a piece on their body, if they are in danger, or enter magic, or drop blood, or crush directly, it will bring you back." ”

Su Yu didn't need to be so troublesome to use the Huicheng Stone, she only needed to use it directly in her backpack.

However, for others, whether it was dripping blood or crushing such a small stone, it was actually a very simple matter, so when they heard Su Yu's words, they couldn't help but exclaim.

Because they were ready to die on this trip, they didn't expect the peak to turn around, but now they feel that it is difficult for them to die.

The reason why they are willing to come after nine deaths is because of loyalty and trust, and the other is that almost everyone present has reached the bottleneck of strength.

The primary bottleneck of all combat skills is easy to break through, and the intermediate bottleneck is not difficult, but the advanced bottleneck belongs to the pinnacle of ordinary people.

If they want to break through, in addition to their extraordinary talents, they must also go through some hardships - if they want to break through at the peak of extraordinary people, they need to be stimulated by some things that are difficult for ordinary people to do.

This is obviously the best opportunity to not only meet the rumored merfolk, stay with the merfolk as a guest, but even have the opportunity to find a breakthrough from it......

However, now that they have this stone to return to the city, the 'Nine Deaths and One Life' they imagined does not actually exist, it is actually just an unknown adventure that the lord is fully prepared for.

With the Returning City Stone, unless someone is impulsive and someone dies, the probability of them surviving is as high as 90%.

"Alright, drink all the underwater breathing potions and isolation barrier potions, let's go down." Su Yu has already explained everything, and she brought these people out, so she naturally has the obligation to bring them back well.

But she's prepared everything she can to prepare, and if something happens to them anyway, it's their own problem.

"Yes." Everyone responded and drank the two bottles of potion one after another, looking at the purple ring mark on the back of their hands and the translucent barrier gradually emerging around them, everyone's hearts became extremely excited and stable.

"Alan, let's go." Su Yu had a shark bead, but she didn't want to be exposed to people, so she also drank the potion, and then at the same time as drinking the potion, she used the shark bead.

Ning Shi knew that Su Yu had a better prop than a potion, but she also knew that Su Yu would definitely not be exposed to people, because she could guess that there must be a limit to the number of people in that mysterious thing.

It's fine if she uses it alone, but if she wants to bring someone else, but the person who doesn't bring it is always prone to pimples in her heart...... Although most of the people who can appear here can be trusted and have good character, it is not easy to gamble, and there is no need to gamble.

Ning Shi quickly drank the two bottles of potion, then tied the strip of cloth given by Su Yu to his wrist and passed it to the next person.

It was easy to be washed away in the vortex, so Su Yu still took something this time and tied everyone together.

Everything was ready, Su Yu and Ning Shi, the two second visitors, were the first to enter the whirlpool, although the others were still a little scared, but seeing so many people, and Lord Su himself was the first to go down, so they also plucked up the courage and jumped in the same way.

After everyone went down, Ah Lan flicked his tail and led the other dolphins directly around the whirlpool and straight to the bottom of the sea.

……

Half an hour later, the group finally got rid of this annoying whirlpool and successfully reached the bottom of the sea.

"I didn't expect the bottom of the sea to be like this, it's a little different from what I imagined."

"What do you imagine the bottom of the ocean to look like, tell me about it."

"Uh...... If nothing else, there are always coral seaweeds and all kinds of cute little sea creatures, right? If I hadn't remembered jumping into the sea, I would have thought I was back in the black realm. ”

"Don't say it, this invisible, it's really similar to the Black Domain."