Jiang Yiyi and Zhao Jiayan also helped sort the materials, and their supplies were not much, the main thing was to count the spirit cores, which were their main assets.

"This piece of paper is wet, it seems that it can't be used, can the strange thing still be damaged?"

Zhao Jiayan picked up the 'receipt slip' and wondered.

Yang Yuan glanced back: "This piece of paper itself should not be a strange thing, just something made by a strange thing." If it's broken, throw it away, or keep it to wipe your fart. Share. ”

But Zhao Jiayan was reluctant to throw it away, and she put away the soaked receipt.

At this time, Yang Yuan glanced back at the direction they had come.

In that direction, the darthorn was unconsciously chasing the water, although it was not fast, perhaps it was only a subconscious movement, and it did not deliberately accelerate.

But the other party is always moving forward, getting closer and closer to them.

But now they're trapped here.

If the Drought Fish come within a hundred miles, will the cooler be able to keep them?

Perhaps, but their food can't last long enough to be consumed here for long.

A solemn look flashed in Yang Yuan's eyes, and he retracted his gaze and looked at the experience data of the Fire Frisbee:

[Cruise Unmanned Fire Frisbee LV.6: 3674/960 (upgradeable)]

The current experience is enough for the Firepower Frisbee to move up to level eight, but it's not enough.

Far from enough!

It is best to be able to raise the fire frisbee to level eleven in one go, reaching the level of a strange object.

In this way, the grasp will be greater.

In short, the longer the time drags on, the better.

"The shells that have been consumed cannot be restored ......"

Yang Yuan tried to recover the ammunition with experience, but found that it didn't work at all.

Previous Power Armor was damaged and could be repaired with experience, but that was if it was damaged.

And the current fire frisbee does not belong to the damaged state, because the cannonball and the fire frisbee, in his concept, belong to two things.

The lack of shells is not mutilated, it has nothing to do with damage, and naturally it cannot be repaired.

Maybe Zhao Jiayan's ability can restore the shells to full capacity, but the original prototype of the fire frisbee made Zhao Jiayan sleep for a day and a night.

Now such a big firepower frisbee, even if it is just to recover a few shells, it is estimated that Zhao Jiayan will not be able to squeeze it dry.

After all, the other party has only awakened for a few days, and the other party is not him, so the upgrade speed cannot be so fast.

"It seems that I will have to save these shells as much as possible in the future, this fire frisbee, but I made it specifically for the purpose of killing the drought!"

If nothing else, the next upgrade will not be full of shells, but will double the existing number.

In this way, the fire frisbee is, to a certain extent, a one-off, and when the shells are finished, it can only be used as a mobile base.

After all, after the firepower frisbee is upgraded to level ten, or even eleven, the volume of the cannonball will be terrifyingly large, and today's human beings should not be able to make such a large cannonball.

Suppressing the eagerness in his heart, Yang Yuan said to Zhao Jiayan and Jiang Yiyi: "You guys go to sleep first, I'll keep vigil tonight, even if I don't sleep for a few days and nights, it's no problem now." ”

Zhao Jiayan glanced at the dense and strange figures thousands of kilometers away, and asked with some concern: "Those things are still eyeing each other, although they may not be able to come out, but it is better to be careful." So I don't think we're going to sleep, and we're not going to be able to sleep. We're all Adepts now, and I'm almost recovered, and I won't have any problems if I don't sleep all night. ”

Yang Yuan thought for a while and nodded: "That's okay, so let's do it, you help Yiyi get some crossbow arrows, and let Yiyi practice accuracy to pass the time." ”

He wanted to see if the Arm Crossbow would increase its range indefinitely, or if it would explode like a pistol bullet.

"Okay." Zhao Jiayan naturally doesn't have any opinions, and there is nothing to do anyway.

"Look for some materials, go into the safe house to make it, don't linger outside. The LED lights can be turned on, and now we don't have to be afraid of ordinary beasts, and ordinary beasts here may not dare to come to this ancient ruin. Yang Yuan admonished.

"Uh-huh." Zhao Jiayan nodded and looked for dead wood nearby.

There are so many dead branches in the decaying leaf layer that they don't have to go far.

And Yang Yuan didn't waste any time, he moved the remaining cooler parts into his cubicle, turned on the LED light, and sat on the bed in the cubicle to concentrate on assembly.

What was originally put in the box was assembled, but it was blown away by the wind.

Now you can't get personal experience by assembling ordinary items, but these coolers can also be kept for upgrades, and you will still give yourself personal experience when you level up.

It took more than three hours, and in the middle of the night, the coolers were assembled.

More than three hundred in total.

Yang Yuan moved all these coolers into a box more than ten meters away, and soaked them in water to brush up on the experience.

There are more than 300 coolers, and if all of them are upgraded to level 11, they can add more than 300 personal experience points to themselves.

"By the way, the cooler that has reached level 10 has to be limited, otherwise it will accidentally create a tornado, and I can't withstand such a toss even if I am beaten with iron." ’

Thinking of this, Yang Yuan immediately took out a short knife, went to the vicinity to find a thicker tree trunk, and cut it into a wooden plank.

Then he cut the planks into cubes, made a mortise and tenon structure, and spliced them into a palm-sized wooden box, just big enough for the cooler.

Because I was not familiar with the mortise and tenon structure, it took more than an hour before and after, and a wooden box that could hold things and had a movable lid that could cover it was made.

[Wooden Box Lv.1: 0/1 (Shoddy wooden box)]

'It's only a little bit of initial experience, but it's convenient to level up quickly. ’

Yang Yuan looked at the rough wooden box that he had 'carefully made', tried to close the lid, open it again, and close it again.

However, the experience did not increase.

He thought about it, picked up a piece of sawdust and put it in, then closed the box again, and then opened it again to remove the sawdust inside.

In this way, the experience of the box increases a little.

'Is it based on the number of times you have experience?' ’

Yang Yuan smiled, he liked this way of brushing experience.

Immediately, he kept putting the sawdust in, closing the lid, then opening the lid again, taking it out again, putting it back in again, and taking it out again......

And so on and so forth.

With each reincarnation, the wooden box adds a little experience.

In just ten minutes, the experience of the wooden box has increased by more than a thousand.

'Tsk, the speed at which this experience is ...... It's so cool. ’

Yang Yuan's mind moved, and he directly upgraded this wooden box, ready to see if the temperature control radiation of the cooler could be isolated after the level was high enough.

[Wooden Box Lv.1: 1719/1 (Upgradeable)]

……

[Wooden Box Lv.2: 1718/4 (Upgradeable)]

……

[Wooden Box Lv.3: 1714/8 (Upgradeable)]

……

[Fresh-keeping box Lv.4: 1706/8 (Increases the shelf life of any food by one month; Upgradable)]

The box has become a lot more refined, but this function is ......

"Fresh?"

Yang Yuan was stunned, but decided to continue to upgrade and see if he could achieve the effect he wanted if the level was high.

……

[Fresh-keeping box Lv.5: 1698/16 (2 months......; Upgradable)]

……

[Fresh-keeping box Lv.6: 1682/32 (four months......; Upgradable)]

……

[Fresh-keeping box Lv.7: 1650/64 (Increases the shelf life of any food by one year; Upgradable)]

……

[Fresh-keeping box Lv.8: 1586/128 (two years......; Upgradable)]

……

[Fresh-keeping box Lv.9: 1458/256 (4 years......; Upgradable)]

……

[Fresh-keeping box Lv.10: 1202/512 (Increases the shelf life of any food by 10 years; Upgradable)]

Yang Yuan frowned slightly, and decided to take a look at it one level higher.

Soon, the upgrade ends:

[Strange Things: Fresh-keeping Box Lv.11: 0/2 (Increases the shelf life of any item by 100 years; Not upgradable)]

[XP +1]

Personal experience has increased a little again, and your level can be increased again.

So Yang Yuan did not hesitate to upgrade his personal level first.

The eleventh level was upgraded to the twelfth level, and it did not produce a qualitative change effect, and the spirit and spirit did not have the great transformation that they had before, but the number of improvements was already very large.

This is also normal, although this upgrade only uses two points of experience, but these two points of experience are obtained from strange things, and the quality is different.

【LV.12：0/4】

Successfully promoted to the twelfth level, Yang Yuan slightly adapted to the skyrocketing physique and strength, and then looked at the strange object box in his hand.