The sea crab entered the gas wrapped in the true yuan, as if it had been stimulated by something, and the two giant claws kept waving.

Then, after a while, he foamed at the mouth and whimpered for his life.

"Dead?" Zhang Mo was stunned, his brows couldn't help frowning, he didn't expect the sea crab to die like this, fortunately he didn't recklessly try the gas in person just now, otherwise the consequences would be unimaginable.

Slightly stunned, Zhang Mo suddenly realized a problem, there should be a large amount of sulfide emitted in the magma at the bottom of the trench, and the sea crab probably died because of sucking these sulfides.

Immediately, Zhang Mo used Zhenyuan to forcibly detain a bubble again.

This time, Zhang Mo didn't put the sea crab in it, but tore a piece of it from the clothes on his body, and then punched the pieces into the gas.

At the same time, another flame was struck.

If the flame ignites the cloth and continues to burn, it means that there is oxygen in the gas.

The flames entered the air mass, and the damp cloth was instantly evaporated, and then burned violently.

"There really is oxygen!" Zhang Mo had a hint of joy on his face, and at the same time secretly breathed a sigh of relief.

However, while the cloth burns, it is accompanied by a slight pop.

"Explosion?" Zhang Mo paused slightly, and secretly speculated: "It should be caused by the deflagration of sulfide in the gas." ”

"How do you get rid of these sulfides?" Zhang Mo frowned secretly.

Although Zhang Mo is an immortal cultivator, absorbing some sulfide will not cause death, but it is not good to enter the body after all, and it may affect his future cultivation.

Thinking slightly, Zhang Mo couldn't help but think of what he had learned in his previous textbooks that lime water could absorb sulfides well.

"Yes, get some lime water out!" Zhang Mo was secretly surprised.

The preparation of lime water is not complicated, it only needs to be used to forge the calcium carbonate rock at the appropriate temperature.

Immediately, Zhang Mo took some calcium carbonate rocks from the nearby trench stone wall.

Then, I saw Zhang Mo shoot out a flame and start forging these rocks.

The true fire of the immortal cultivator is invulnerable, so even if it is at the bottom of the sea, surrounded by seawater, it will not be affected in any way.

After a little effort, the rock turned red and bubbled upwards.

Zhang Mo knows that these bubbles are carbon dioxide produced by the decomposition of rocks by heat.

The rest is basically the quicklime that Zhang Mo needs.

In fact, to put it bluntly, it is calcium oxide.

During the production process, Zhang Mo kept wrapping it with true yuan, and after completing it, he added some seawater to it again.

Quicklime absorbs seawater and produces a lot of heat.

After a while, lime water was formed.

Zhang Mo passed the gas wrapped in Zhenyuan through the lime water, and the lime fruit really had some reactions, and even the color changed somewhat.

Seeing this, Zhang Mo was secretly satisfied.

Subsequently, several crabs are placed again into the treated air mass.

This time, the sea crab didn't react much, and it lived well.

Seeing this, Zhang Mo secretly exhaled, his heart was relieved, the problem of oxygen was completely solved, and he could stay here with peace of mind this time!

Immediately, Zhang Mo took a breath of homemade oxygen and began to settle down.

Zhang Mo tried his best to restrain his breath and fully integrate himself into the world of this trench.

Gradually, Zhang Mojin settled down, and his breath became vague, looking like a stone statue sitting in a cave from a distance.

If you don't look closely, you won't find him.

In the blink of an eye, more than half a month has passed.

Jin Yangzi surfaced to the sea again for ventilation, and after searching for so long, he didn't find any trace of Zhang Mo, which couldn't help but make Jin Yangzi feel irritable.

Attracting Linglong Butterfly, Jin Yangzi asked impatiently, "Have you caught Zhang Mo's breath?"

"Back to the host, nothing was found. Linglong replied.

"Strange, doesn't this Zhang Mo need to surface the sea for ventilation?" Jin Yangzi was puzzled, "Impossible, even my Jindan Realm has to come up every half a month to change his breath, can he build the foundation realm without breathing?" Or has Zhang Mo fled to other sea areas?"

A while ago, a typhoon had just blown on the sea, and it was difficult for Linglong butterflies to capture the corresponding breath at this time.

"Could it be that Zhang Mo took advantage of that time to escape from this place?" Jin Yangzi secretly hesitated.

After a slight pause, he only heard Jin Yangzi ordering: "Linglong Butterfly, you go to other sea areas to take a look, as soon as there is a smell of Zhang Mo, tell me immediately!"

"Yes, master!" replied Linglong.

Immediately, the Linglong butterfly flapped its wings and flew towards other seas, while Jin Yangzi continued to dive to the bottom of the sea to search.

Deep in the trench, Zhang Mo didn't know how long he meditated, and was finally woken up by a wave of hunger.

Zhang Mo pinched his fingers and calculated, he hadn't eaten for almost a month, "No wonder I'm so hungry!"

Immediately, Zhang Mo released the Yuan Shen and searched for anything edible nearby.

The species here are quite abundant, and Zhang Mo's Yuan Shen quickly caught two sea snakes.

"Okay, that's it!" Zhang Mo thought for a moment, and opened his mouth to spit out the flying sword.

In an instant, the two unlucky sea snakes were cut in half by the flying sword, and were finally forcibly detained by Zhang Mo.

Sea snakes can be eaten directly, but Zhang Mo still likes to eat cooked food.

I saw Zhang Mo let out a flame and simply dealt with the two sea snakes.

Then, swallow it in one gulp.

Suddenly, a warm feeling came from his stomach, and Zhang Mo felt a burst of satisfaction.

Subsequently, continue to settle down.

Almost every three days, Zhang Mo has to change his breath, and every half a month, he has to eat.

Other than that, there is no activity, like a stone statue.

On this day, it was the day of eating.

Zhang Mo unleashed his primordial spirit and searched for prey.

In general, sea snakes are the main condition, and occasionally some sea crabs are eaten.

Sea snakes like to live in seaweed, and Zhang Mo habitually searches the seaweed that he often hunts.

"Huh?"

Suddenly, Zhang Mo found a red sea snake swimming in the seaweed, which was very different from the sea snake he usually caught.

This red sea snake looks very unusual, with green eyes that make people shudder. And there is a faint circle-like pattern on the body, which flickers and brightens with its swimming.

After a slight pause, Zhang Mo spit out a flying sword and slashed at the red sea snake.

The flying sword slashed out, and the red sea snake seemed to be aware of it, and its body twisted rapidly, quickly dodging.

Unexpectedly, it really let it dodge.

Seeing this, Zhang Mo couldn't help but pause, and a smile appeared on the corner of his mouth, "It's a little interesting!"

The blow failed, Zhang Mo thought about moving again, and once again controlled the flying sword to slash at the red sea snake.

The red sea snake was frightened and quickly dived towards the bottom of the trench.

Zhang Mo's flying sword quickly caught up and slashed it directly.

The flying sword brought back the corpse of the red sea snake, and Zhang Mo looked at it carefully.

After a closer look, Zhang Mo was surprised to find that there was aura leaking out of the sea snake's flesh and blood.

"Could it be that this is a spirit snake?" Zhang Mo was secretly surprised.