In the next few days, Dongfang Xiao still went to the entrance every day to sell cans, as the deadline approached, fewer and fewer people came to report, but Dongfang Xiao's business was not greatly affected, but in the past few days, Dongfang Xiao has earned nearly 200,000 gold coins, which is enough to open the skills of the blood qi system.

However, after thinking about it, Dongfang Xiao still decided to postpone the decision to open the blood qi skills, and now he has learned a lot of skills, most of them are just preliminary masters, greedy and chewy, these gold coins, Dongfang Xiao still decided to keep them for emergencies.

It was the last day of registration, and Dongfang Xiao closed the stall early, ready to go to see Barr. Since Baal got his lightsaber and small crystals, he hasn't come to sell his weapons anymore, and Dongfang Xiao hasn't seen him in the past few days, so Dongfang Xiao also wants to see what results Baal has researched in the past few days.

Dongfang Xiao came to Barr's house, and sure enough, Barr didn't know what he was studying in his casting room, and Dongfang Xiao waited quietly outside the room after telling him.

Fortunately, although Barr was obsessed with research, he had not even reached the point where he didn't even see the guests, and it didn't take long for Barr to appear in front of Dongfang Xiao.

"This little crystal is so peculiar!"

Before Dongfang Xiao could ask, Barr said excitedly.

"Xiao, look at this!"

Balshing rushed out a long sword, the material of this long sword was very ordinary, not even a refinement-level weapon, but at the hilt of this sword, there was a square hole about a finger wide, which seemed to be left behind for inlaying something.

"Is it?"

Dongfang Xiao looked at the hole that was more than a finger wide, and already had a guess in his heart, the size of this hole was just the same as the size of the small crystal.

Sure enough, Baal embedded a small red crystal in his sword. With the embedding of the small crystal, on the original ordinary long sword, there was actually a fiery red fire attribute energy flow, Baal grabbed the long sword and waved it lightly, and a piece of wood turned into two pieces in response, and on the cross-section of those wooden blocks, it left traces like flames.

"This is the first effect of the small crystal I discovered, which can attach attributes to the weapon, just like now, adding a small red crystal to the long sword, the long sword can release a fire attribute attack, and adding a small white crystal will produce a light attribute attack."

"It's been able to study to such an extent!"

Dongfang Xiao was a little surprised, although he had also speculated that the small crystal would have such an effect, but he had no way to prove it, he didn't expect that Barr would be able to do it.

"But it's a pity, because the material of this sword is very poor, the conductivity of energy is also very limited, a small crystal contains very little energy, and most of the energy is wasted in the conduction, so this effect can only last for a short time."

As he spoke, the energy on the long sword gradually dimmed, and finally turned into an ordinary long sword again, and the small red crystal also made a "bang" and turned into ashes.

Baal shrugged his shoulders, the small crystal just now only lasted for about a few minutes, and if this long sword was a refinement-grade weapon, it might be able to last even longer.

"These small crystals seem to have the same effect as the magic crystal, but the difference is that the energy purity of these small crystals is very high, which is comparable to the energy contained in the magic core, if these small crystals are used as an energy source, it is much better than the magic crystal."

"Magic crystals?" Dongfang Xiao said to himself, magic crystal is a very common and very important thing in this world, the price of magic crystal is much cheaper than that of magic core, even civilians can use some daily items that use magic crystal as energy, the most common is the magic crystal lamp used by every household, which is a device that converts the energy in the magic crystal stone into light.

"And I found something else interesting." Barr smiled slightly, and took out a red crystal that was a hundred times larger than the small crystal just now.

"Big red crystals?" Dongfang Xiao recognized the thing in front of him at a glance.

"This is the one I was inspired by the colorless crystal you gave me, and the large crystal that was smelted from a hundred crystals. I've found that after fusing these small crystals into large crystals, the properties seem to change somewhat. ”

Speaking of this, Barr took out a large blue crystal, but the strange thing is that the color of this large blue crystal is actually a little dull, as if the energy in it has been drained.

"Yes, I've used up a lot of the energy in it, but I've discovered something very special because of it." Baal took out a small crystal again, the color of the small crystal was very dull, and a hint of blue luster in the center of the crystal seemed to prove that this crystal was once a small blue crystal.

"In fact, the color of this large crystal used to be almost the same as this small crystal, but after a few days, the energy in this small crystal has not changed, and the color of this large crystal has recovered a lot."

"The energy has been restored, isn't this an effect that only the magic core has?" Dongfang Xiao was a little surprised, if the magic crystal was a disposable battery, then the magic core was equivalent to a rechargeable battery, and the capacity of this rechargeable battery was more than a step larger than that of an ordinary battery.

"I think you also know that this is an effect that only magic cores have, and when a certain number of small crystals are gathered together, such a change will occur, which is really surprising to me."

"So, I had a bold idea." There was a strange glint in Baal's eyes.

"What thoughts?"

"I want to use these crystals for casting, and I will definitely be able to forge very powerful weapons!"

"Among the correction devices you asked me to make, small crystals are one of the materials, and I believe that by integrating small crystals into the casting of weapons and equipment, more magical effects will definitely occur!"

"I didn't expect him to be able to research so many things."

Dongfang Xiao was amazed, this Baal is a genius in casting, in just a few days, he has already studied so many things, maybe in terms of cultivation talent, his level is only D level, but in terms of casting talent, I am afraid that his level is enough to reach C level, or even higher.

"It seems that I still have a pretty good eye for people." Dongfang Xiao said complacently.

Thank you for the tip!