Putting aside the hot veins, on the other side, Lin Jiu and the mermaids who went to the deep sea on the other side also went very smoothly.

The new habitat that Xiaolan Xiaoyin and more than a dozen mermaids explored together is very suitable for mermaids to live, more precisely, it is suitable for newborn mermaids, the sea water is not very deep, and newborn mermaids do not have to face the problem of high water pressure.

The food resources are even more abundant, and it is far away from the deep sea where large marine mutant beasts are active, which is very suitable for the development of the current mermaid population.

Lin Jiu took Xiao Hai and his own man around the bottom of the sea, the range of Xiao Lan Xiaoyin's circle was not very large, at least it was not comparable to the thirty-two peaks of the Qianshan Sect, and the formation of such a range was quite simple for Lin Jiu and Zhou Muhai.

The new environment is many times better than the dark water layer under the sea pit, and although life is comfortable, the evolution of the mermaids will slow down again without the tempering of the sea pit.

However, since Xiaolan Xiaoyin knows how to find Lin Jiu to prohibit the formation and protect the clan, she will not even be unable to think of this, and everything will be gained and lost.

It's not hard to guess that this is something that the merfolk have to give up in order to protect their new life.

Whether it is a human being or any other species, reproduction comes first, and Xiaolan and Xiaoyin, as the patriarchs, have no problem with the general direction they choose.

For these new species of merfolk formed after the end of the world as a result of extremely fortuitous and special experiences, nothing is important to be able to have children.

The mermaids' new habitat is in a trench that is neither deep nor shallow, and the trench is not too narrow with a shallow layer of seaweed, like a natural bunker.

The other mermaids entered the range drawn by the patriarch and began to tidy up and rebuild the nest, Lin Jiu Xiaohai and Lu Shijun followed Xiaolan Xiaoyin to wander around, basically mastering the range and surrounding terrain required by the formation, and then surfaced.

On the water surface, Lin Jiu made a large piece of ice floe as usual, Da Bai Erbai lay on the ice to cool down and rest, Lin Jiu and Xiao Hai squatted on the ice floes, Zhou Muhai condensed his spiritual power on his fingertips, and in two or three clicks, he depicted a sketch of the location selected by Xiao Lan Xiaoyin on the ice at the bottom of the sea.

Lin Jiu didn't interfere, watching Zhou Muhai calmly prepare for the work, and then began to arrange the position of the yuan stone according to the algorithm of the formation, represented it with dots on the map, and pointed it out one by one.

Lu Shijun also listened carefully on the side.

The current situation is that the reserve of Yuan Shi in the last days is far higher than that of spirit stones, but fortunately, there are few disciples of immortal cultivation in the Qianshan Sect now, and the spirit stones that Lin Jiu brought out from the small mountain villa before are still enough.

When Lin Jiu ran out of spirit stones on hand, the spirit essence buried under the peak of the Little Immortal Source and the Hidden Mountain Sect Leader in the morning should also be able to come in handy and derive new spirit veins.

But the formation needed by the mermaid in front of him is not small, Lin Jiu was not ready to take out the precious spirit stone for the mermaids to use at the beginning, there are so many yuan stones, there are still two ore veins in China, and the formation materials used by the mermaids must of course come out of the yuan stone.

So this time, Lin Jiu not only brought Zhou Muhai, a little expert in the array, but also Lu Shijun, a demon cultivator who was used to activate the Yuan Stone.

Lu Shijun prides himself on being the most powerful man around Lin Jiu, and he is very concerned about his "lighter" duties, so even if he doesn't understand the formation, he still squats beside the master and apprentice and listens carefully, and remembers the order of the position of the yuan stones pointed out by Zhou Muhai in his heart.

"Master, do you think this will work?"

Zhou Muhai knew that Lin Jiu intended to teach himself, and when everything was calculated and checked that there were no omissions, he turned his eyes to Lin Jiu, and a trace of nervousness rarely appeared in his heart.

"Yes, finely clear."

Lin Jiu glanced at Zhou Muhai, only to find that the child's nervousness was written on his face, Lin Jiu smiled, raised his hand and rubbed Zhou Muhai's hair and heart.

"Master, Master, I'm no longer a child."

Since Lin Jiu's cultivation, his appearance has basically been fixed at his twenties, plus Lin Jiu's own facial features are delicate and petite, if he doesn't deliberately release his momentum, he will look even smaller, and standing with the current Zhou Muhai looks more like a sister and brother than a master and apprentice.

Lin Jiu's sudden action made Zhou Muhai blush, and he looked up at Lu Shijun, the "senior mother" beside Lin Jiu who was single-mindedly memorizing the order of the formation yuan stones, and found that his senior sister had not noticed his embarrassment, so he was relieved.

"Xiaohai, how long do you think this formation can last?"

Zhou Muhai was stunned, he really didn't realize this problem.

"This is a shielding formation, the formation is buried deeper, and it will not be a problem to use it for hundreds of years."

"That's the problem, how long can the formation of the Hidden Mountain Sect last, have you ever calculated?"

Lin Jiu looked at Zhou Muhai, his eyes were patient and gentle, but he really looked like a master.

"The formation of the Hidden Mountain Sect can be repaired at any time, and time is not a problem......

As soon as Zhou Muhai finished speaking, he understood what Lin Jiu meant, and he took it for granted.

The formation itself is an extremely detailed knowledge, from the terrain where the formation is located to the placement of the formation, the calculation to the time and possible accidents, etc., etc., all need to be paid attention to by the arranger, but he is not thoughtful enough.

"The formation is ever-changing, and the factors that affect the operation of the formation are endless, and a little change is very different...... Look here, what if you add a few Yuan Arrays here? ”

Lin Jiu's fingers circled around the rock layers on both sides of the trench, pointing at Zhou Muhai.

"If there is a Gathering Yuan Array created by a top-grade Yuan Stone, not only can the problem of the energy required for the mermaids' evolution be solved, but the Gathering Yuan Array can also nourish the Yuan Stone that supports the shielding formation, so that the use time will be at least doubled!"

Lin Jiu nodded, watching Zhou Muhai simply cross out and overturn the previous design, re-draw and re-arrange the formation on the new ice surface, and once again sighed at his good luck.

Where can you find such a talented apprentice?!

On the side, Lu Shijun, who had finally written down the original formation map, frowned and was speechless.

Can it be used or not, can't the two masters and apprentices say it earlier?

"It's basically the same, don't be so bitter and hateful."

Lin Jiu smiled, staring at Zhou Muhai and re-arranging the formation.

"Master, we can completely fuse the Gathering Yuan Array and the Shielding Formation into one formation...... The location of the Yuan Stones in these three places, with a little more arrangement, can make these Yuan Stones not only the formation points of the shielding formation, but also part of the formation of the Gathering Yuan Array. If you add a little more trap to it......"

"Add an extra replacement yuan stone at the bottom of each yuan stone position, and the repair work can be completed at that time, even if there are interference and changes in the later stage, at least five hundred years of normal use can be guaranteed!"

"Well, five hundred years is enough."

The mermaid group will also evolve, and will slowly develop its own unique living habits and defense mechanisms, Lin Jiu's formation is only a foreign object that can be protected for a while, and only when he is strong can he truly survive in this dangerous deep sea.