There was an object on the tabletop, one meter long, it was made of white crystal like the tabletop, the front mouth was round, the back mouth was square, it was like an hourglass, but it was lying flat on the table. Of course, it is also much larger than an hourglass, especially the front mouth, which is an arm's length, and the back mouth is much smaller, only the size of a palm.

He Yao walked over and pushed it with his hand, but it didn't move at all, it turned out that it was one with the desktop.

"Xiaofeng, come over and see what this thing is?"

He Yao walked around the table, but he couldn't see it, so he called the north wind to come over.

"Little Wind!"

After shouting a few times in a row, but not hearing the recovery, He Yao looked at the northward wind, but saw that he was still staring at those portraits.

"Boy!"

He Yao's voice was much louder, and the north-leaning wind came back to his senses, and his eyes looked at He Yao with a blank look.

He Yao was surprised and exclaimed, "Won't you?"

Besides, you're much better looking at them than them, so why bother looking at them?"

"It just feels familiar!"

Bei Tingfeng didn't look at those portraits, but he was still thinking, although these portraits were different, the eyebrows were very similar, he always felt that he had seen them there, but he couldn't remember them

He Yao naturally knew that Beifeng didn't have that kind of fetish, and it was a little strange to see him look at those portraits, but now that he said that he was familiar, he was even more curious: "What, do you recognize them?"

Bei Leaning Wind shook his head: "I don't recognize it!"

"Then don't think about it, come here and see, what is this!"

He Yao didn't delve into it, and walked to the table again, pointed to the funnel-shaped thing, and said, "I've never seen this thing, have you seen it?"

"I haven't seen it either!"

The north-leaning wind walked over, looked at it for a moment or two, and then said, "But I can think of its use." ”

"What's the use?"

"The hourglass can be used however it is, but it should be different from an ordinary hourglass, and what is put in is absolutely different from what flows out!"

Listening to the words of the northern wind, He Yao suddenly realized: "You mean that this is a processor, adding raw materials to generate higher-grade items!"

Bei Leaning Wind understood He Yao's words, nodded and said, "If I didn't guess wrong, it should be like this!"

"And what will be the raw materials?"

He Yao thought about it for a moment or two, and soon had an answer, the most that can be used for conversion here is naturally gold and silver.

He Yao picked up some silver, threw it into his mouth, and said, "I hope I didn't guess wrong!"

The silver was put in, and it disappeared into the big mouth in an instant, but there was a trace of aura fluctuation in the small mouth.

The aura was fleeting, but it was not hidden from the two people present, He Yao was half surprised, half helpless: "Sure enough, but what is the use of such a trace of aura?"

"Maybe there is too little gold and silver!"

Bei Leaning Wind thought about it, and then his mind moved, and he used the aura to throw the gold and silver outside into the big mouth, and sure enough, the aura in the small mouth became rich again, but the aura was far less dense than that in the Eight Dao Ling space.

The northerly winds felt useless and were about to stop. He Yao's voice sounded: "Don't stop, it seems that something is coming out." ”

Listening to her words, the northward winds did not stop, but accelerated the speed of gold and silver throwing.

Until half of the gold and silver in the back hall were thrown into the big mouth, He Yao waved his hand to signal that the northward wind stopped.

Looking at the north-leaning wind, an object slipped down in the small mouth, the rhombohedron, the size of an adult's palm, crystal clear and crystall, and the most important thing is that the aura it contains, far better than the space of the Eight Dao Ling.

Looking at that thing, He Yao was dumbfounded: "How is it possible, how can it be possible to come out of the spirit stone?"

"Spirit stones?"

The north-dipping wind has never heard of this name.

Seeing that he didn't understand, He Yao explained: "The spirit stone is a kind of mine unique to the fairy world, as the name suggests, the spirit stone is a stone containing spiritual energy, and the use is also very simple, I don't need to say more about this!"

Bei Leaning Wind nodded, with such sufficient aura, it was naturally twice the result with half the effort when used for cultivation.

Just listening to the spirit stone production and the fairy world, Bei Leaning Wind felt a pity: "If this spirit stone is placed in the world, it will definitely make the world crazy, but it is only produced in the fairy world, I am afraid it is of no great use, it is really a tyrannical thing." ”

Listening to the remarks of the northern wind, He Yao was stunned, figured out what he meant, and then said: "Don't think too high about the fairy world, in addition to having immortal energy that the human world does not have, and the aura is more sufficient, there is no difference between it and the mortal world, and the people in the immortal world also have to cultivate spiritual energy first, how can they not use spirit stones."

Besides, the usefulness of spirit stones doesn't stop there......"

After a pause, He Yao continued: "No matter whether it is a formation or a refining weapon in the immortal realm, spirit stones are necessities, and spirit stones are still the currency traded in the immortal world, how can they be useless. ”

"I see!"

Beifeng had an understanding, and suddenly remembered He Yao's surprised expression just now.

"Since spirit stones are also currency, it is normal for gold and silver to be transformed into spirit stones, so what is there to be surprised about?"