The most basic thing to practice is to use the energy of heaven and earth for one's own use. Heaven and earth aura is a very wonderful thing, it is different from the air we generally know, it can be said that air is also a form of aura, but its quality is too poor, can only meet the most basic breath, far from the effect of cultivation.

If you want to cultivate, you have to collect the aura of heaven and earth, so for a person who wants to cultivate, you have to be able to feel its existence and be able to use it, and this is the basic difference between mortals and cultivators.

The spiritual root is precisely the key premise for whether you can perceive the spiritual energy of heaven and earth, so it is particularly important.

Inside the storage bag, Ding Nan also found a few small crystalline stones, which were in the shape of a ling. According to the above introduction in "Miscellaneous Discussions on Cultivation", this kind of stone is called "Spirit Stone", which is divided into four grades: low-grade, medium-grade, high-grade, and superb. The best spirit stone is divided into five attributes: gold, wood, water, fire, and earth, and occasionally some rare and strange attributes, such as thunder attribute and wind attribute, etc., while other grades do not have this attribute division.

Spirit stones are the common currency of the Xiuzhen Continent, which is used to pay for and buy things, and can also be used for cultivation.

The spirit stone is called the spirit stone, because it contains the pure aura between heaven and earth, compared with the content of the aura in the ordinary air, the spirit stone is not only deep and dense, but also has fewer impurities, which is easier to absorb and use. This kind of aura is very beneficial for cultivation, and with this cultivation, it can speed up the cultivation speed of the cultivator.

In addition, the spirit stone is a necessary material for the arrangement of the formation, generally speaking, the spirit stone bears the energy of the operation of the formation, supporting the positive operation of the formation, just like the operation of the engine needs to burn oil, the formation is like the engine equipment, and the spirit stone is the gasoline that provides energy, which is indispensable and difficult to replace.

Ding Nan held these spirit stones in his hand, they were all only low-grade spirit stones, a few pieces, not even medium-grade, if it wasn't nearly used up by Zhang Can, it was that this Zhang Can was really poor.

In fact, it was Ding Nan who wronged people, as an outer disciple, it was normal to only have a few low-grade spirit stones. Because the spirit stone veins found in the Xiuzhen Continent are also limited, coupled with excessive development and consumption, the spirit stones are seriously depleted, and the number is constantly decreasing, and now the spirit stones have become luxury jewelry.

For an ordinary sect's outer disciple, the sect will only provide one or two lower-grade spirit stones a month for cultivator resources, so ordinary disciples rarely use spirit stones directly to cultivate, but use them as currency to buy other cultivation resources, so as to make limited use to the greatest extent.

After the spirit stone became the hard currency of the Xiuzhen Continent, a unified measurement standard was gradually formed, which was specially used to divide its specifications and grades in detail, just like the paper money on the earth, according to the rules, you can tell whether it is a dime or a hundred.

Ding Nan held the spirit stone in his hand to run the exercises, only to feel a pure and surging energy with his palm holding the spirit stone into the meridians of the whole body, the amount and concentration of this spiritual energy was several times that he had refined from the atmosphere before, and after a while, all the true qi consumed before was fully replenished, and the whole body was full of energy, so uncomfortable.

After trying it, Ding Nan didn't continue to consume, there are only a few pieces of this kind of good thing, of course, good steel must be used on steel, and it can't be wasted like this.

Ding Nan collected all the other basic books, leaving only one copy of "Low-level Five Elements Spells".

According to the introduction in "Miscellaneous Discussions on Cultivation of Truth": Qi practice is divided into nine layers, and the higher the cultivation, the more difficult it is, and many people will not be able to cross a threshold in their lifetime, but each layer of refinement will reap great benefits. The most obvious is the increase in longevity, each layer of refinement can increase the longevity of ten years, and after all the nine layers of qi cultivation are completed, you can increase the life span of a total of ninety years, which is equivalent to living one more life. This is also one of the biggest benefits and temptations of cultivating immortals, and it can also be said that cultivating truth is for immortality.

By the time he cultivated to the fourth level of Qi cultivation, the true qi in his body was already relatively abundant, and he could support the casting of ordinary small spells.

Ding Nan had already cultivated to the eighth level of Qi training, although now he had inexplicably dropped two levels, and he only had the cultivation of the sixth layer of Qi training. But I haven't practiced any spells before, and it was because I didn't have a magic before, but now I have encountered the cultivation methods of "Fireball Technique" and "Ice Arrow Technique", so of course I have to give it a try.

"Fireball Technique" is the lowest-level basic spell, and if you successfully practice, you can instantly launch a fireball to attack the target, causing the target to burn and hurt.

There is no need for spells, no seals, only the transformation of true qi into fire elements can be released, which is quite easy for cultivators of fire attribute spirit roots, but Ding Nan himself doesn't know what kind of attribute spirit root he is.

The biggest problem with a person's cultivation is that there is no one to guide them, they are prone to detours, they have to go to the strange side of everything by themselves, it is easy to say when they are in the right direction, and they don't know when they are in the wrong direction, and no one reminds them, which often leads to going further and further on the wrong road, wasting time and energy.

Ding Nan kept trying according to the recipes in the book, but no matter how hard he tried, he couldn't say that the true qi transformation was successful, and in the end, the true qi in his body was exhausted and he didn't make a little spark.

After the true qi was exhausted, Ding Nan immediately meditated and practiced, but the speed of replenishment was too slow, so he simply took out a spirit stone and directly absorbed the spirit stone to replenish.

The speed of replenishment at this time was much faster, and in a short time, the consumed true qi was replenished.

After having the true qi, Ding Nan continued to try, and just when the true qi was about to be exhausted, he finally practiced a little spark. As soon as the spark came out and a flash of inspiration, Ding Nan immediately found the key place of this spell.

Without delay, Ding Nan immediately took out a spirit stone again to replenish it, absorbed the spiritual energy in the spirit stone again and again to restore the true qi, thought about and summarized the gains and losses just now, and then silently deduced it in his heart.

In this way, continuous practice and continuous deduction, Ding Nan has mastered this "fireball technique", with a flick of his finger, a fireball comes out of the trend, the temperature is very high, and it directly ignites a piece of reed grass by the stream.

Since then, several spirit stones have been used by Ding Nan unconsciously, and only the last one is left.

"This spirit stone is really a good thing, without him, it may take me several days to master such a 'fireball technique', and this last remaining one can't be moved for the time being. The so-called can make perfect, as long as I practice more than one person, this fireball technique may be smoother, and the power will be higher and higher. Ding Nan thought to himself.

Time had passed imperceptibly, and it was not until he stopped now that Ding Nan felt that his stomach was already croaking with hunger. looked at the side, and saw the little beast Ding Xin lying on the stern of the boat and sleeping.

Ding Nan took out a few fruits from the storage bag and ate them, the taste of the spirit fruit is really not ordinarily good, it is not comparable to the fruits on the earth at all, while eating the fruits, while looking at the scenery along the way, it feels very beautiful.