There was a wise glint in the eyes of the Green Python King, and she knew that things were not so simple.

After seven days of waiting, she saw the results.

This black fog, little by little, drifted up to the sky, turned into a cloud, and then in the cloud, rain fell......

"This rain must not be simple!"

The green python king was bold, and with a direct wave of his hand, dozens of raindrops converged into a small water ball.

She opened her mouth and swallowed it directly.

As soon as she took her mouth, she felt an unprecedented sourness, which made her instinctively feel a little uncomfortable, as if she had eaten some expired food...... The green python king frowned, and forcibly endured the feeling of nausea, carefully feeling the impact of the rain on her body.

"Somewhat destructive............"

The green python king felt very clearly, this rain is extremely corrosive, although it can't hurt her, but for low-level demon beasts or animals, it is a catastrophe.

Her eyes looked at the Tongtian River, where many of the fish swimming above the current had died.

The acid rain melted into the surface of the water, and then corroded them, and at a glance, I don't know how many aquarium were lying on the surface of the water with their white bellies.

Even some low-level demon beasts have also died a lot.

Those who didn't die were also injured, and their bodies were corroded little by little, as if they had been splashed with sulfuric acid!

"Last time, it was to create chaos internally, this time, starting from the outside, you are very calculating, but unfortunately, I have seen through it!"

She cast a spell herself, placing a layer of prohibition on the water.

The black mist can gush out, merge into the rain clouds, and turn into rain to fall, but it can't hurt the water in the water, because the prohibition she has arranged protects the river, and the rain hits the prohibition and makes a tinkling sound......

"The king is kind-hearted, and he can't bear to die in vain to the creatures of the demon clan, so he even arranged the ban with his own hands!"

"It is worthy of the green python king, the first king under the demon lord!"

"Long live the King!"

When the demon soldiers saw this scene, they immediately touted it.

They are sincere, because as a demon race, their rules are even more cruel than those of the human race, and the human race has such a thing as courtesy, righteousness, and shame, and many cultivators also have chivalrous actions...... But the demon clan believes in natural selection, the survival of the fittest, these dead low-level demon clans and water tribes are just food in the mouth of the big demon, and the demon king is even more disdainful of them.

However, the Green Python King personally arranged the ban for the sake of these low-level demon clans, which is really rare, and made the demon soldiers have a different sense of this cold-hearted demon king.

Of course, for the Green Python King, her original intention was just to prevent Zhang Heng's "treacherous trick from succeeding", and the reason why the ban was set was also here, not some ridiculous protection of the weak...... However, she didn't explain, so let the demon soldiers misunderstand, which is not a bad thing for her.

"Zhang Heng, is this all you have to do......

After doing all this, the Green Python King returned to the front of the Medicine Palace.

Her eyes narrowed slightly, and there was a hint of pride and doubt in her heart.

This time, compared to the last time, it seems to be much smaller.

But she didn't know that in the seven days since she left, there was a big situation in the medicine hall.

"Sir, is this okay?"

The lids of the three hundred Dan furnaces were all opened, and what poured out of them was not Dan incense, but fire!

That's right, Agni!

Almost all of the medicine boys looked at it, the raging fire was burning, and the entire medicine hall was red, and the hot heat spread in all directions, making them sweat profusely.

"Is this also alchemy?"

"I'm afraid the elixir has already been burned!"

"It's setting fire!"

The medicine boys' eyes were full of horror, and the three hundred Dan furnaces were all burned red, and the touch was enough to burn people's fingers.

"This is the Dafa of Flame Refining Medicine, I burn with real fire to distinguish medicinal properties and pharmacological ......" Zhang Heng said lightly, he walked in the middle of the burning Dan furnace, holding a jade slip in his hand.

It looks like it's concentrating, and it seems to be recording something.

It didn't take long for a jade slip to be recorded, and he casually threw it to a medicine boy and took out another blank jade slip to record.

The medicine boy held the jade slip and secretly looked at it with his divine thoughts, only to see that in the jade slip, there were many things densely recorded, and they were all about the dialectics and speculations between the elixirs, no matter how big or small, all of them were recorded, so that when he looked at it, he had an eye-opening feeling!

"This way of alchemy can be so detailed!"

The medicine boy was shocked, he thought that Zhang Heng was messing around, but he was in awe.

This fire refining medicine Dafa is indeed a divine skill, and it can actually use the burning of flames to identify the subtle differences between the elixirs.

"The master is really amazing!"

The medicine boys no longer questioned, their eyes full of reverence.

In their eyes, Zhang Heng is simply an alchemy god.

But they didn't notice that in the midst of the raging fire, wisps of black gas spread out.

This black gas is very weak, if you don't look closely, you can't see it at all.

It rose up in a curling manner, from the doors and windows, from the cracks in the walls, and even from the underground masonry, spreading out little by little, and finally, spreading the entire Demon Lord Cave!

The flames were rolling, and naturally there was black smoke surging, and these black smokes, gushing endlessly, covered up this inconspicuous wisp of black gas.

So much so that even if the green python king returned, he didn't find any clues.

She just frowned, and when she saw the billowing black smoke, she dissatisfied.

"What the hell is this Zhang Heng doing?

The demon soldier who stayed behind replied.

"I don't know why, two days ago, all of a sudden, the black fog turned into black smoke, and it kept pouring out, it couldn't really be on fire, right?"

The Green Python King pondered for a while, and couldn't guess anything, so he could only say secretly.

"Whatever you want to do, I've already set a ban, and the acid rain won't pose any more threats. ”

She was optimistic, but she thought there was a possibility.

Zhang Heng may not know that she has discovered acid rain, so she is increasing her efforts, but he doesn't know that what he is doing is useless.

The fire burned for five days, and the black smoke also rose for five days, and in these five days, the demon king, the great demon, the commander, the demon general, and the demon soldiers, when they raised their heads, they could find that there was a black smoke gushing out of the sky......

The medicine hall seems to have become a boiler room, and the doors and windows are large chimneys.

At the beginning, there were many demons panicking, because the shadow of the last time was too big, but after getting used to it, they subconsciously ignored this smoke, anyway, it didn't hurt, and the green python king told everyone that she had already made arrangements.

"What is this guy up to?"

Fox Mei'er looked at the sky, her brows furrowed.

"As long as he can refine my elixir, he can do whatever he does. ”

The demon lord muttered.

He also used his divine thoughts to probe the black smoke and found acid rain, but it was all blocked by the prohibition of the Green Python King.

Therefore, acid rain will not become any climate, and it will not cause the chaos of the last time, so he naturally has nothing to worry about in his heart.

Five days later, the weather was clear, and there was no longer black smoke coming out of the medicine hall.

Even the acid rain gradually stopped, but for the sake of safety, the green python king did not remove the ban, but still stayed on the river.

"It looks like you're realizing you've failed...... That's it, as long as I am a little more serious, you can't do anything......" The Green Python King sneered in his heart.

But she didn't know that the real chaos had just arrived.

In a cave mansion, there is a big demon retreat, and he should have reached the most critical moment, with fine sweat on his forehead.

But at this time, a wisp of black qi, but silently, poured into his body.

"Poof!"

The big demon's face changed drastically, and suddenly a mouthful of blood spurted out, he covered his belly and shouted in disbelief.

"How is that possible?"

There is more than one such thing.

There were patrol demon soldiers, and all of a sudden, they also showed a strange look, and even threw aside the weapons in their hands.

They unanimously covered their bellies!

There is also the demon beast under the moon before the flower, it is the moment when the eyebrows come and go, you and me, suddenly, the two sides with affection, their faces changed drastically, and they also covered their bellies!

Gollum!

In the belly, there was a series of familiar and unfamiliar sounds.

"Is this ......?"

"This feeling of being ...... for a long time"

There are monsters that show incredible colors.

"I, I want to have diarrhea!"

The other monster looked like he'd seen it.