Since the Sixteen Immortal Monarchs have settled in the country, it is naturally impossible for the demon clan to have no action at all for more than 10,000 years. On average, they will invade the territory of the Terrans once every thousand years, of course, this time is not fixed, but the whole is not much different.

In these more than ten Terran demon wars, the two sides can basically be said to have their own victories and defeats, and the Terran side has lost more times, but with the desperate resistance of the Terran powers, the demon clan can be pushed back out of the realm every time.

It's just that every time, there are heavy casualties.

Occasionally, there will be some amazing and brilliant people on the Terran side, leading the Terran to push to the south of the realm, so that the demon clan will not dare to move.

But if you want to completely exterminate the demon race, it is impossible.

In the past two thousand years, the cultivation of the human race has entered the territory relatively large, but the demon clan has naturally not pulled it down, and it is normal for the two sides to go back and forth and fight each other on the border.

Only this time......

Feiyunzi shook his head fiercely.

This time the situation is clearly serious. Generally speaking, the changes of the demon clan are often accompanied by changes in the aura of the whole world, in other words, the overall improvement of the aura of the world, which will cause the demon clan's demon kings and demon ancestors, who are more in line with the natural environment, to enter the realm quickly, and their strength is naturally inflated, so they are naturally unwilling to continue to stay in that bitter cold place.

And the overall improvement of the aura of heaven and earth will also cause a rapid increase in the number of demon beasts in various places.

So......

"Senior brother, what are you thinking about here?"

Feiyunzi was in a hurry, the voice of Huoyun came from the door of the main hall, Feiyunzi looked up, and saw Huoyun holding a stone slab in his hand and rushing inside.

"An elder in your hall actually took a student to skip class, it's really nonsense!" Feiyunzi scolded and shook his head helplessly.

This junior brother of mine is good at everything, and this is his character......

It's also an old goblin who has lived for more than 600 years, what kind of system does it become to behave like this every day?

"Oh, you also know my unseated temperament," Huoyun sat opposite Feiyunzi with a smile and handed over the stone slab in his hand: "Senior brother, take a look, the good thing I found this time by skipping class, the strange array diagram board left by the ancient Immortal Monarch!" ”

"Oh?!"

Feiyunzi's eyes suddenly lit up!

In the era of the Sixteen Immortal Monarchs in ancient times, a lot of powerful formations were lost, but fortunately, some of the carved plates could still be left, and each piece was of great use.

Now I've found another piece of ......

"Wait for me to see," Feiyunzi took the slate and looked at it carefully, it is difficult to understand the specific function of this single array, but according to the age of this slate, it should be genuine!

"Good stuff!"

Feiyunzi nodded, handed the slate back to Huoyun, and said, "You go and hand over the slate to our sect's formation research center to see what the purpose of this slate is." ”

"That's necessary," Huoyun nodded, and then said with a wink, "By the way, Senior Brother, didn't I take in a new little apprentice recently?" ”

Hearing Huoyun mention this, Feiyunzi suddenly said angrily: "Nonsense! You are an elder, even if you want to accept apprentices, you should accept those genius disciples who have already entered the realm, this time you accepted the little guy named Lu Yun, this person's cultivation is average, and he is a good hand at doing some things! ”

It's no wonder that Feiyunzi was upset when he heard Huoyun mention this.

He really took in apprentices......

Too sloppy.

After all, no matter how much it is a catastrophe, one of the elders of the sect, playing like this will directly lower the level of the disciples.

As a result, he didn't want Huoyun to be unhappy when he heard this, and said, "Cut, senior brother, you are just too old-fashioned." My apprentice is so good, he can play and talk, and he can make things! If you're not busy right now, come and see me, he's really made a good thing this time! ”

Feiyunzi said helplessly: "Don't be that chess or something like that, it's useless." ”

Huoyun shook his head decisively and said, "How is it possible? This thing made by my apprentice this time is very useful, even in the face of the demon clan, it can come in handy! ”

As soon as he heard that it could be of great use to the demon clan, Feiyunzi's eyes suddenly lit up: "Is this true?" ”

Huoyun's chest snapped: "That must be!" Senior brother, you don't look at your junior brother and my eyes! ”

"Then let's go, let's see!"

The two of them immediately left the main hall, and soon arrived at a martial arts arena, far away Feiyunzi saw Lu Yun sitting in the cauldron, and the sides were full of strange things.

"Good boy, come on, this is my senior brother!"

Huoyun hurriedly introduced Lu Yun.

Lu Yun was startled, and hurriedly jumped down from the big flying pot and saluted Feiyunzi: "Disciple Lu Yun, I have seen the master. ”

"Well," Feiyunzi nodded slightly, then touched the beard on his chin, and said, "Your matter has been passed on, and the kid has some ideas." ”

He didn't praise Lu Yun, but he didn't criticize it.

After all, to be honest, the things that Lu Yun was making up were just children's things in the eyes of a character of Feiyunzi's level, and he didn't make any big baskets, so there was no need to say more.

Soon Huoyun took the improvised cannon and said, "Senior brother, look at this, this is what my good apprentice has researched, and the power is quite good," he said like a child offering treasures, and he said it with great vigor, and quickly got it done, and then said: "Senior brother, look carefully!" ”

As he spoke, he injected some spiritual power into it, and immediately heard a "boom" sound, and the cannonball suddenly flew out, smashing a boulder hundreds of feet away!

"Oh?!"

Feiyunzi didn't take it too seriously at first, but when he saw the power of this thing, he was immediately excited!

"It's really powerful!" Feiyunzi took the barrel of the cannon, looked at it, and then looked at the fragments of the boulder in the distance, and said, "It almost has the power of the third layer of the foundation to strike with all its might!" ”

He said and looked at Lu Yun: "You made it?" What are the disadvantages of this? ”

The power has been seen now, so the next most critical thing is naturally the disadvantage.

This power is no problem, so at this time, Feiyunzi's main concern is whether this thing is convenient to use.

You must know that the ease of use of this kind of weapon directly determines the value of this thing, so it is natural to ask clearly.

"Naturally, there are shortcomings," Lu Yun scratched his hair and said, "It's just that this thing can't be standardized now, so it will be more difficult to mass-produce." ”

"Standardization?" Fei Yunzi understood after a little thought: "You are talking about a production method that is mass-produced like a spirit rune and each copy is exactly the same?" ”

This point is very general.

The reason why the spirit rune is expensive, the production process is not a problem, each spirit rune is printed out of a mold, and the difficulty is mainly in the charging.

So Lu Yun said this standardization, Feiyunzi knew where the key point was when he thought about it.

"Yes, yes, that's what it means," Lu Yun said: "It would be much better if it could be standardized, and this is only a test product at present, and there is still a lot of room for improvement in the future." ”

Not to mention anything else, this improvised gun now has to be loaded once with one shot.

But when this thing can be smaller, and then improve it to make a burst shot, then it will be perfect!

"Not bad! Well done little guy! Ha ha! Fei Yunzi understood how useful this thing was, he smiled and patted Lu Yun's shoulder: "Okay, it seems that Huoyun really didn't see the wrong person!" Well, it's good that you've made such a good thing. Say, what do you want? ”