Calcium oxide, the chemical formula CaO, is calcined from limestone, so it is called calcined lime, also known as quicklime, and expresses the shape of a white powder.

Calcium oxide is an alkaline oxide that is sensitive to moisture and easily absorbs carbon dioxide and moisture from the air. After reacting with water, the calcium hydroxide (Ca(OH)2) solution is formed, which is a medium-strong base that can neutralize acidic substances.

......

"Bang ......"

Bags of calcium oxide piled up in Richard's yard, piled up as high as a hill.

After a long time, the accumulation was over.

"How about it, my dearest friend, Your Excellency Richard, are you satisfied with the goods this time? Let me tell you, what I have helped you get this time is definitely the best quality goods, and there are no impurities in it. Moreover, the price was not quoted at all. I can swear by that—in the name of my ancestors!" Alex leaned over to Richard's side, full of sincerity, but no matter how sincere his expression was, there was always a treachery that could not be concealed.

Richard didn't believe Alex's words at all: It's strange that it can be the best product!

But I don't want to worry about that, after all, as long as it can meet the use. The next moment, his eyes flashed, he didn't say anything, paid the balance according to the original agreement, waved his hand and sent Alex and the coolie away.

After Alex and the coolie man left, Richard approached the piled up bags of calcium oxide, filled the calcium oxide into the Spatial Iron Ring, and then walked into the modified spell lab beneath the main laboratory.

......

In the blink of an eye, into the night.

Richard's figure appeared in the cemetery outside White Rock City, and because he had come so many times, he walked to the grave of Alex's ancestor almost with his eyes closed.

Bend over, reach out, and press on the ground.

The "Earth and Stone Mastery" spell is activated, and the ground cracks.

Glancing at the chlorine gas filled in the passage, Richard took out the familiar iron bucket from the spatial iron ring and opened the lid.

This time the cans were no longer filled with chlorine, as the graves were apparently filled with enough chlorine, this time with a saturated calcium hydroxide solution to neutralize the chlorine.

After all, turning the tomb into a cavern full of chlorine gas might wipe out all dangerous beings, but it also made it impossible for him to enter. Even if you force yourself into with an oxygen cylinder, you have to consider whether the oxygen cylinder will be corroded by chlorine, and you also have to consider how far the line of sight can be seen in the high concentration of chlorine.

Therefore, in order to ensure that he can successfully explore the third time, he must find a way to neutralize the chlorine gas.

This is the same as using the corridor to bury and kill the rope gate in the forest of the Emerald Kingdom - at first, how hard to blow up the corridor, and then how hard to dig out the other party's corpse.

Thinking of this, Richard began to cast the "Water Drop Condensation" spell in reverse, so that the calcium hydroxide in the iron can atomized into tiny water droplets, forming a white mist, and poured into the depths of the tomb along the downward passage, quickly reacting with yellow-green chlorine gas.

It can be seen with the naked eye that the mist is like a beast with a large mouth open, and once it comes into contact with chlorine gas, it will immediately and quickly devour.

The calcium hydroxide mist is like a broken bamboo, advancing layer by layer.

Soon, one iron can of calcium hydroxide solution was used up, and Richard began to take out a second can to atomize and neutralize.

Then the third, fourth, fifth......

After a short time, the calcium hydroxide solution in the iron cans in the two spatial iron rings was all depleted, and Richard found that a problem that had been bothering him before had reappeared.

That is, in order not to attract attention, he can only quietly bring calcium hydroxide solution to the grave at night, but because of the limited reserves of the two spatial iron rings, the amount of calcium hydroxide solution he transports is seriously limited, and he can only continue to transport and act as a transport worker again and again.

"Whew-"

Richard exhaled lightly, and he was already a little reluctant to accept this question, isn't it just a little more time.

Without much fuss, carefully repairing the cracked passage in the ground, Richard quickly returned to the laboratory.

After that, for several nights, Richard kept running between the laboratory and the cemetery.

......

A few days later, on a dark night with a month of hidden stars, Richard estimated that the chlorine level in the tomb had been reduced to an acceptable range, and after some thought, decided to embark on a third exploration.

Cemetery, in front of the graves of Alex's ancestors.

Richard atomized the calcium hydroxide solution in the iron cans of the entire space iron ring, controlled the influx into the grave, and put away the empty iron pipes.

Taking a deep breath, he took out a somewhat strange set of clothes from another spatial iron ring. It is a one-piece leather jacket with a special paint, and it comes with leather socks and a leather hat. After putting it on, wearing a bird's beak mask, a modified oxygen cylinder on his back, and connecting it with a leather tube, Richard was already in good airtight protection.

Calming down, moving his limbs, and getting used to his new, somewhat bloated state, Richard strode towards the grave.

It is true that Li sensed that the chlorine gas in the cemetery had been neutralized and diluted at this time, and there was no danger, but out of a cautious mentality, he decided to wear protective clothing to go in and see the situation.

With that, Richard walked into the passage, and his figure disappeared to the ground.

The third exploration, which Richard was confident and thought could be pushed flat, began.

......

The night was dark.

At the same time that Richard entered the tomb, in the center of White Rock City, the White Stone Tower complex, two black shadows appeared silently.

The two figures are a man and a woman, or rather, the outward manifestation is a man and a woman - Somen and Mukoni.

The two of them glanced around vigilantly, and after making sure that no one had noticed, they looked at each other and made a decision. With an undetectable incantation, Somen and Mukoni cast their forms and quickly swept towards the heart of the complex.

But as soon as the two of them started, they suddenly sensed something, and their faces changed greatly.

"Be careful!" called out Somon.

"Be careful!" Mouconi cried out.

The two of them quickly stopped, and as best they could, they unleashed the spell shield.

A red basket and two energy shields quickly appeared in front of them, followed by the sound of "Xiu Xiu Xiu" breaking through the air.

"Bang bang bang-"

The energy shield held up by the two of them shook violently, and a large number of cracks appeared, which looked crumbling, but they still managed to resist the attack.

Somen and Mukne's eyes were solemn, looking at what was attacking their shield.

I saw that it was a number of golden ice picks, full of power, far beyond the ordinary one-ring spell, and after hitting their shield, they exploded, turning into golden-dyed ice crystals and scattering all over the ground.

After seeing it, Somen and Mu Koni glanced at each other, Mu Koni raised her eyebrows, and shouted into the night: "Who is it!

"Hehe, it's me!"

A gust of wind blew, and a snow-white figure appeared in front of Somen and Mu Coni.

White boots, white pants, white clothes, white hats.

Macbeth!

Macbeth squinted at Somon and shook his head—he didn't know, then at Mukne, and nodded—yes.

"Tsk, it's you!" Macbeth said meaningfully to Mukne, "Let me tell you what's good, you ran away before, why do you want to come to our White Stone Tower again?

In other words, since the last time you appeared, our White Stone Tower has been vigilant and directly mobilized one-sixth of its strength to deal with you specifically.

One-sixth of the power!

A large group of wizards, including me, are busy every day just to find you and get rid of you and your companions. You're good, you took the initiative to send it to the door, tsk, I really don't know what to say. ”

"Just say...... 'Too much nonsense, lead me to a chance, let you die'!"

At this time, Suomen suddenly shouted at Suomen, and a purple flame appeared in his hand and quickly swallowed it into his mouth.

With the flames swallowing, a powerful momentum erupted from Suomen's body, and climbed sharply, instantly breaking through the first-level wizard and becoming a second-level wizard.

Then Suomon jumped up, and the whole person "soared" all at once, burning into a slender needle-like flame, piercing Macbeth's eyebrows.

It's a powerful attack as soon as you strike!

Variation Construct Spells, Second Ring Low-Level, Serve the Fire with Your Body!

"Brush!"

Fast!

The flame speed is extremely fast!

So fast that there is almost no time to react!

Before Macbeth could close his mouth, and with a stunned look on his face, flames pierced through his eyebrows.

Macbeth shook and fell to the ground with a "poof", and the corpse splattered a large cloud of dust.

The flame that pierced Macbeth's eyebrows stalled in the air, landed, and quickly turned back into Somon's body.

Somon swept Macbeth's corpse with cold eyes, his lips opened and closed, and he commented: "Hmph, mouthy idiot!"