Li Hua lay on the table, staring intently at the iron box in front of him, only to see that the moonlight sprinkled on the iron box was like encountering a black hole, and all of them were absorbed into it.

Could it be that this iron box left to me by my mother really has mysterious powers?

Li Hua scratched his head, and his right hand carefully stretched out towards the iron box, for fear that he would be attacked by a mysterious force.

When his hand trembled and touched the iron box, nothing special happened, but he felt that the appearance of the iron box felt more textured, as if it was attached to it by something transparent, which made him feel very comfortable.

He couldn't wait to open the iron box to see what had happened inside.

As the lid slowly opened, Li Hua opened his mouth in surprise, his eyes widened more and more, and it turned out that the box was filled with fantastic light blue gas, like fairy energy. When the lid was fully opened, the pale blue gas was all gone, and the inside of the box was still the same. However, the pencil that was folded in two inside the box has undergone an earth-shattering change.

The pencil, which had been broken in two, was now a single one, and it was so brand new that it didn't look like it had been glued together, as if it had never been broken.

Li Hua picked up the pencil and found that the aura contained in this pencil was far from being comparable to the low-grade pencil that had been. Li Hua held the pencil in both hands, carefully feeling the aura fluctuating from the depths of the pencil.

It's definitely a one-grade magic weapon!

Li Hua cried out excitedly, he didn't expect such a magical thing to happen in this dilapidated iron box, it was too unbelievable.

A low-grade pencil is only worth two spirit stones, while a first-grade pencil can be worth ten spirit stones. If there are a few more pencils like this, Li Hua will soon be able to improve his life.

Touching this first-grade pencil, the more Li Hua thought about it, the happier he became, he couldn't imagine that he would be able to have a first-grade magic weapon so soon. You must know that magic weapons are very important for immortal cultivators, if there is a high-grade magic weapon, even if the strength is worse, you can defeat opponents who are stronger than yourself.

After the excitement, Li Hua's eyes returned to the body of this broken iron box, and he couldn't help but wonder how this broken iron box turned a low-grade magic weapon into a first-grade magic weapon.

In the world of cultivating immortals, it is not uncommon to use one's own spiritual power to improve the grade of magic weapons, but it is said that it takes a huge amount of spiritual power to do so. Compared to the efficacy of the refining furnace, it would be too stupid to use the immortal cultivator's own spiritual power to improve the grade of the magic weapon.

Could it be that this iron box is a refining furnace?

If you want to use the refining furnace, you must at least have the cultivation of the third year of junior high school, because when you reach the third year of junior high school, you can get in touch with the discipline of chemistry, and you will master part of the knowledge of refining weapons, and then use various chemical spells to improve the grade of the magic weapon.

And Li Hua just stared at this iron box and didn't do anything. This shows that the iron box must not be a refining furnace.

So what is it, and how did it rise so quickly?

Either way, it's good that it works so well.

As soon as Li Hua thought of the efficacy of the iron box, an idea suddenly popped up, since the iron box can improve the grade of the magic weapon, can it also improve the grade of the drug?

The grade classification of drugs and the grade classification of magic weapons are roughly the same, and the drugs are divided into four major grades, namely: elixir, elixir, miracle medicine and holy medicine. Each major grade is divided into nine sub-grades. To be precise, there should be ten sub-grades in the classification of elixirs, because pills that are not even ranked in one grade but have a little aura can only be called inferior grades. The inferior pill was only contaminated with a little bit of aura, and it had no effect on the cultivation of immortal cultivators at all.

For primary school students, they can generally only be mixed in the big grade of pills, especially in today's era of drug scarcity, it is an earth-shattering thing for primary school students to be able to see a grade of elixir.

But the medicine is very useful for an immortal cultivator like Li Hua who has poor congenital qualifications and a weak foundation. So Li Hua wanted to give it a try and see if he could upgrade the cheap low-grade pill to a first-grade pill, so that he would definitely slowly make up for the innate disadvantages.

As soon as he said it, Li Hua took out all his savings and used the last remaining spirit stone to buy ten colorful fruit candies from a small shop on the street. This lowest-grade elixir basically has no effect, and parents buy a big bag for children to eat and play.

But fruit candy is still very useful as the cheapest medicine. After being promoted to the third year of junior high school and studying chemistry, many experiments related to drugs will use fruit candy as raw materials, and even if the experiment fails, it is not a pity to lose a few pieces of fruit candy.

At this time, Li Hua was like a chemist, holding ten pieces of fruit candy, carefully doing experiments. However, he is not quite the same as those chemists. Those really top chemists, even if they only have the cultivation of high school students, they won't feel particularly distressed if they lose a few Nine Rank Top Pills.

And Li Hua can't even afford to lose these ten inferior pills now, which is all his two months' food money!

Therefore, Li Hua divided the ten pieces of fruit candy into two parts, and if the experiment failed, the loss could be reduced.

He gently placed the five pieces of fruit candy into the tin box, and after making sure that there was nothing wrong, he carefully closed the lid, and then sat down at the table, quietly waiting.

As soon as the lid was closed, the moonlight on the table began to flow again, subtly changing around the iron box.

The mysterious power of this iron box must come from the moon!

Through observation, Li Hua easily came to this conclusion, as for how the iron box absorbs the power of the moon, I am afraid that it is only possible to study and understand it when he goes to junior high school and learns physics. Now he just needs to master the basic use of this iron box and let it work for his benefit.

In this way, relying on high-grade magic weapons and medicines, Li Hua can overcome the difficulties of his poor qualifications and improve his strength. At the same time, he can also obtain a large number of spirit stones by selling high-grade magic weapons and medicines, and use spirit stones to do more things.

After all, in the world of cultivating immortals, the usefulness of spirit stones is second only to the strength of immortal cultivators themselves, and with spirit stones, any powerful magic weapons and medicines will be available.

Li Hua also speculated that he hadn't found out that the iron box left by his mother had such a magical effect before, because this iron box would only start to absorb Yuehua when it contained magic weapons and medicines. When it's empty, it's an ordinary iron box.

After half an hour, Li Hua opened the iron box with excitement, and the inside was the same as last time, first a misty air dispersed, and then five pieces of fruit candy full of aura came into view.

Li Hua hurriedly took out the fruit candies, held them in the palm of his hand to feel the aura, and speculated on their grade.

Sure enough, these five pieces of fruit candy have been promoted to a pint pill!

A pint of pills can play a certain role in intensive cultivation, especially for immortal cultivators like Li Hua who have no cultivation at all, after taking a pint of pills, it will definitely produce a lot of effects.

Li Hua picked up two of the fruit candies and swallowed them in one gulp, suddenly feeling a burst of warmth in his stomach, and then a stream of heat filled the dantian, and the whole person felt light.

According to Teacher Bai's teachings, he casually typed out a few basic mathematical addition formulas with his hands, although no handwriting appeared in mid-air, he could already feel the aura overflowing from his palm, and he believed that in less than a month, through unremitting efforts, he would be able to type the formula.

As the hot air that filled the dantian slowly precipitated, the medicinal effect of the two fruit candies gradually passed. Li Hua rubbed his stomach and thought to himself, in just half an hour, the original low-grade pill could be upgraded to a first-grade pill, what if it was used for one night?

The more Li Hua thought about it, the more excited he became, so he simply put all the three fruit candies in his hand back into the iron box, and waited to open them again tomorrow morning, maybe these first-grade pills could be upgraded to second-grade pills!

With excitement, Li Hua practiced the essentials of mathematical spells for another two hours, and then put the iron box in the place where the moonlight was most abundant, and looked at it intently for a while before reluctantly going to bed.