Jiang Yiyi and Zhao Jiayan also helped sort the supplies. While their supplies weren't much, they focused mainly on checking the Spirit Monster Cores, as these were their primary assets.
"This paper got wet, and now it seems unusable. Can Marvels really get damaged?"
Zhao Jiayan picked up the 'receipt', puzzled.
Yang Yuan glanced back at it: "The paper itself probably isn't a Marvel, just something created by one. If it's ruined, toss it out, or use it as toilet paper."
However, Zhao Jiayan couldn't bear to throw it away, so she saved the soaked receipt.
At this moment, Yang Yuan glanced in the direction they had come from.
In that direction, the Drought Fiend was constantly moving unconsciously toward water. Although not fast, it was moving instinctively, not intentionally speeding up.
However, it was always advancing, getting closer to them.
But now, they were trapped here.
If the Drought Fiend came within a hundred miles, could the cooler protect them?
Perhaps it could, but their food wouldn't last long. They couldn't stay here for an extended period.
A trace of seriousness flashed in Yang Yuan's eyes. He retracted his gaze and looked at the experience data of the Firepower Flying Disc:
[Cruise Unmanned Firepower Flying Disc LV.6: 3674/960 (upgradeable)]
The current experience was enough for the Firepower Flying Disc to reach level eight, but it wasn't enough.
Far from enough!
It would be best to upgrade the Firepower Flying Disc to level eleven in one go, reaching the Marvel level.
That way, the assurance would be greater.
In any case, the longer they could delay, the better.
"The consumed shells can't be restored..."
Yang Yuan tried to use experience to replenish ammunition but found it was impossible.
When the Power Armor was damaged before, experience could be used to repair it, but that was under a state of damage.
However, the current Firepower Flying Disc wasn't in a damaged state because, in his concept, shells and the Firepower Flying Disc were two different things.
Lack of shells didn't count as incomplete or damaged, so naturally, it couldn't be repaired.
Perhaps Zhao Jiayan's ability could fully replenish the shells, but even the prototype Firepower Flying Disc put Zhao Jiayan to sleep for a whole day and night.
Now, even replenishing a few shells for such a large Firepower Flying Disc would likely drain Zhao Jiayan completely.
After all, she had only awakened her abilities a few days ago, and she wasn't him—her leveling speed couldn't possibly be that fast.
"It seems that I must conserve these shells as much as possible in the future. This Firepower Flying Disc was specifically created to kill the Drought Fiend!"
As expected, the next upgrade would not fully replenish the shells but would double their current number instead.
Thus, the Firepower Flying Disc was somewhat disposable. Once the shells were exhausted, it could only be used as a mobile base.
After all, once the Firepower Flying Disc reached level ten or even eleven, the shell size would become astonishingly large. Human technology today probably couldn't produce such large shells.
Suppressing the urgency in his heart, Yang Yuan said to Zhao Jiayan and Jiang Yiyi, "You two should sleep first. Tonight, I'll keep watch. Even if I don't sleep for days on end now, it's no problem."
Zhao Jiayan, looking at the dense and eerie figures a kilometer away, asked with some concern, "Those things are still eyeing us with malice. Although they might not be able to get out, we should still be cautious. So, I think it's best for us not to sleep. We probably couldn't sleep anyway. We are now Superpower Users, and I'm almost fully recovered. One sleepless night won't affect us much."
Yang Yuan thought for a moment and nodded, "That works too. Jiayan, help Yiyi make some crossbow arrows so she can practice her aim to pass the time."
He wanted to see if, after leveling up, the crossbow would either increase its range indefinitely or produce an explosive effect like a handgun bullet.
"Alright," Zhao Jiayan naturally had no objections since there wasn't much else to do.
"Find some materials and go into the Safe House to make them. Don't linger outside. You can turn on the LED lights now. We don't have to fear ordinary alien beasts anymore, and besides, ordinary alien beasts might not dare to come to these Ancient Ruins," Yang Yuan advised.
"Okay." Zhao Jiayan nodded and started looking for deadwood nearby.
The layer of decayed leaves contained many branches that hadn't completely decayed, so there was no need to go far.
Yang Yuan didn't waste time either. He moved the remaining cooler parts into his cubicle, turned on the LED light, and sat on his bunk focusing on assembling them.
The ones previously placed in a box were pre-assembled, but they had been blown away by the wind.
Now, assembling normal objects didn't grant personal experience, but these coolers could be kept for upgrading; once leveled, they'd still yield personal experience.
After more than three hours, by late night, these coolers were fully assembled.
Altogether, more than 300 units.
Yang Yuan moved all these coolers into a box a dozen meters away, using water to gain experience.
With over 300 coolers, if all reached level eleven, they could provide more than 300 points of personal experience.
'Right, the cooler that's already reached level ten must be restricted; otherwise, if it inadvertently creates a tornado, even if I'm made of iron, I can't withstand such a toss-up.'
Thinking of this, Yang Yuan immediately took out a small knife, found a thicker tree nearby, and carved it into a wooden plank.
He then cut these wooden planks into square blocks, creating a mortise and tenon structure, and assembled a palm-sized wooden box, just enough to hold the cooler.
Due to unfamiliarity with the mortise and tenon structure, this took over an hour, but eventually, a functional box with a movable lid that could be securely closed was made.
[Wooden Box Lv.1: 0/1 (crude wooden box)]
'With a starting experience of one point, it allows for rapid leveling.'
Yang Yuan looked at his 'carefully crafted' rough wooden box, experimented with closing, opening, and reclosing the lid.
However, no experience increased.
Thinking it over, he picked up a wood chip, put it inside, closed the lid, then reopened it to remove the wood chip.
This way, the box's experience increased by one point.
'Is it counted by usage times for experience?'
Yang Yuan grinned; he loved this method of farming experience.
Immediately, he repeatedly put wood chips inside, closed the lid, opened it, took the chip out, then back in and out, back and forth.
Every cycle increased the wooden box's experience by one point.
In merely ten minutes or so, the wooden box's experience soared beyond a thousand.
'Wow, this speed of farming experience...is exhilarating.'
Yang Yuan willed the wooden box to upgrade directly, intending to see if, at a high enough level, it could isolate the cooler's temperature control radiation.
[Wooden Box Lv.1: 1719/1 (upgradeable)]
...
[Wooden Box Lv.2: 1718/4 (upgradeable)]
...
[Wooden Box Lv.3: 1714/4 (upgradeable)]
...
[Freshness Box Lv.4: 1706/8 (extends shelf life of any food by one month; upgradeable)]
The box became more refined, but its feature...
"Freshness?"
Yang Yuan hesitated, then decided to continue upgrading to see if a higher level would achieve the desired effect.
...
[Freshness Box Lv.5: 1698/16 (two months...; upgradeable)]
...
[Freshness Box Lv.6: 1682/32 (four months...; upgradeable)]
...
[Freshness Box Lv.7: 1650/64 (extends shelf life of any food by one year; upgradeable)]
...
[Freshness Box Lv.8: 1586/128 (two years...; upgradeable)]
...
[Freshness Box Lv.9: 1458/256 (four years...; upgradeable)]
...
[Freshness Box Lv.10: 1202/512 (extends shelf life of any food by ten years; upgradeable)]
Yang Yuan slightly frowned and decided to upgrade one more level.
Soon, the upgrade was complete:
[Marvel·Freshness Box Lv.11: 0/2 (extends shelf life of any item by one hundred years; not upgradeable)]
[Experience +1]
Personal experience increased by one point again, allowing level-up once more.
So, Yang Yuan unhesitatingly upgraded his personal level.
From level eleven to twelve, no qualitative changes occurred, and his vitality and spirit did not undergo a major transformation as before, but the quantitative increase was substantial.
It was expected, as although this upgrade consumed only two experience points, they were obtained from a Marvel, of incomparable quality.
[LV.12: 0/4]
Successfully reaching level twelve, Yang Yuan adapted slightly to his surging physique and strength, then turned his attention to the Marvel Box in his hand.