After leaving the courtyard, Li Changsheng came to the credit exchange office in the storage area.

As usual, the incense burner in this courtyard still emits pale blue smoke.

Li Changsheng's spirits were lifted, and his spirit was obviously much brighter, as if all his fatigue had been dissipated.

If it was before, Li Changsheng would still be curious, but now he already knows that what is burning in the incense burner is a material called Condensing Grass, which will give people such a feeling.

Soon, Li Changsheng came to the credit exchange window and began to exchange credits for resources.

He now has six hundred credits, enough to redeem most of the items in the manual.

Unlike usual, today's credit exchange office is relatively deserted, and there are not many people in the entire lobby, which is normal, isn't it, after all, it is not easy to earn credits.

Li Changsheng picked up a credit exchange manual and began to look for items that were useful to him, skipping the elixir, secret method, treasure and demon duel, Li Changsheng mainly checked the two columns of treasures and special.

"There you have it, Demon Core Energy Tractor!" It didn't take long for Li Changsheng to find his target, and the cheapest low-power Demon Core Energy Tractor only needed 30 credits.

However, what Li Changsheng wanted was not a small power, for him, the greater the power of traction energy, the better, which could save a lot of time, and finally he chose a high-power demon core energy tractor that required 70 credits to exchange.

Li Changsheng didn't stop his movements immediately, and continued to check other items, he has always had a lot of opinions about the laziness of the round, although he often uses food to tempt it to train, but the effect is not very obvious, the roundness of the nature is difficult to change, not to mention that it spends most of its time in sleep, and it can't wake up no matter how it screams.

"Found it!"

When he saw the introduction of a certain item, Li Changsheng's eyes lit up, and he seemed to see the appearance of being round and training hard.

This stuff is also not expensive, it only costs 20 credits!

After deciding that it was enough, Li Changsheng went directly to an unmanned window and handed the student order to the staff.

The other party first checked it with the instrument and asked, "Hello, what do you want to exchange?"

"Ten super-large multi-purpose incubators, a high-power demon core energy tractor, and an awakening flute!"

A long time ago, Li Changsheng had the idea of establishing an incubation room to improve the hatching success rate of fairy eggs, but due to the limited credits and soul crystals at that time, it was delayed until now.

The super-large multi-functional incubator, similar to the advanced incubator, can use the energy of the demon core to simulate different environments, improving the hatching speed and success rate of fairy eggs.

The difference is that the extra-large multi-purpose incubator can not only hatch super-large goblin eggs, but can also be split into ten small incubators for ten normal-sized goblin eggs to hatch.

Of course, the credits required for exchange are far beyond those of advanced incubators, one requires 50 credits, in order to set up an incubation room at one time and provide incubation conditions for nearly a hundred goblin eggs, Li Changsheng had to exchange ten, if you add the demon core energy tractor and the Awakening Flute, the six hundred credits that have not yet been heated will instantly be left with a pitiful 10 credits!

"Please wait a moment!"

The staff is obviously a lot more polite, even if he has been here for many years, but it is rare to meet such a generous student, and the students who can take out so many credits at one time are almost all the strongest among the students.

"Those ten super-large multi-functional incubators will help me deliver them to this address!" Li Changsheng filled in the address of the small courtyard where Lin Wan's mother and daughter lived.

Naturally, the credit exchange office has a free package delivery business, provided that it is necessary to redeem more than three-digit credits at one time.

"Okay, we'll deliver to this address on time!"

While speaking, the staff respectfully handed the student order back to Li Changsheng, he was just an ordinary person, although he was a relative of a certain mentor, but he only dared to fake the power of ordinary students, but he did not dare to offend the strong among the students.

This is how little people survive!

Soon, Li Changsheng got the Awakening Flute of the high-power demon core energy tractor.

The high-power demon core energy tractor is a cylindrical object, and the whole body is made of hard moire steel, even if the demon core inside accidentally explodes, it will not explode the tractor, ensuring the safety of the user.

The Awakening Flute looks the same as an ordinary flute, with a withered yellow body and several small holes on it, unlike ordinary flutes, the Awakening Flute is made of a material called Yin Soul Bamboo, as long as it is played, it can emit a special sound wave that points directly to the heart, forcibly awakening the sleeping goblin, which can be called a sharp weapon against the sleepy goblin.

Li Changsheng didn't stay long, and returned to the No. 1 courtyard with two items.

He looked at the manual of the high-power demon core energy tractor, poured in a small pile of demon cores according to the instructions, and after sealing the lid, he began to start.

Bang ~ bang ~ bang ~

As if the sound of fried beans sounded, the tractor vibrated violently, and under a strong traction, the energy in the demon core was forcibly pulled out.

Li Changsheng hurriedly activated the Yuanhe Ten Colors Orb, and the Orb suddenly spun around, greedily devouring the energy that was being pulled out.

As time passed, the ten-colored brilliance on the orb gradually became brilliant.

It is worthy of a high-power demon core energy tractor, and after just a few minutes, the first batch of lower demon cores has exhausted the energy, and the energy inside has been released.

"It's not full yet!" Li Changsheng was speechless for a moment, although they were all lower-level demon cores, but they were better than a large amount, there were dozens of demon cores in this batch, and they didn't feel full at all.

How much energy can this multi-colored orb store?

It's no wonder that the goblins under the divine beasts will die as long as they swallow it, this is the rhythm of being supported by a large amount of energy!

In order to test the capacity of the Yuanhe Ten Colored Orb, Li Changsheng put in a batch of demon cores again and began to pull energy.

As more and more energy was absorbed, the light of the Yuanhe Ten Color Orb also became brighter and brighter, and as a price, Li Changsheng consumed more and more demon cores.

By the time of the seventh batch, the Yuanhe Ten Colors Orb had finally stopped absorbing energy and was emitting a brilliant ten color brilliance.

Li Changsheng hurriedly turned off the tractor, his face was not very good-looking, this was because there were too many krypton demon cores, just this time of absorption, he almost exhausted the demon core in his hand, and the value was equivalent to nearly a hundred soul crystals!

"I hope it can be maintained for a while!" Li Changsheng secretly said in his heart, if the maintenance time is too short, it will be difficult for him to maintain it.

At the first moment, Li Changsheng began to activate the Yuanhe Ten Color Orb.

The Yuanhe Ten Colored Orb relevitated and began to emit a rich Ten Colors of Radiance, and Li Changsheng imprisoned these energies within a range of ten meters.

Soon, the high-density energy area took shape, and even if you only look at it with the naked eye, you can faintly see a large number of energy points of different colors within ten meters.