What should be used to calculate the amount of chakra for a ninja. Is it the lower ninja, the middle ninja, the upper ninja, and the shadow? No, it's calculated by year, which is actually the same as the setting in general martial arts novels. From the first day of refining chakra, the cultivation of ninjas has become a daily homework for ninjas. For ninjas, the game between them is a game of wisdom and a game of skill. However, at the root of it, this is still a chakra game. No matter how powerful your wisdom is, no matter how powerful your technique is, as long as your chakra is gone, then all this is empty talk.

Therefore, the ninja's emphasis on chakra can be said to be the first to bear the brunt. And as for how to have more chakra, this is what every ninja in the ninja world wants to know. However, even with this thirst, there is no way to grow the chakra quickly. So, is there really none? It's not for nothing. In the ninja world, a strong family must have a strong bloodline. Senju, Uchiha, Uzumaki, and Hinata, these families who inherited the bloodline of the ancestors of the chakra in ancient times, are born with a chakra growth rate higher than that of ordinary ninjas. If the amount of chakra cultivated by an ordinary ninja in a year is set at "1", then the Uchiha and Hinata are "5", the Senju is "10", and the Uzumaki is "20". Here, some people may ask, why is the Uzumaki clan, as a ninja clan of the same bloodline as the Senju clan, whose chakra is "20"? Because the Uzumaki clan, who are proficient in sealing techniques, have long discovered the secrets of the cultivation of chakra that the world now knows. Among them, the Yin Seal is a technique used by the Vortex clan to seal their own chakra, and then use the lack of ontological chakra to multiply the chakra. Therefore, the Uzumaki clan deserves to be the family with the most chakras in the ninja world.

However, because the physique of the ninjas of each race in the ninja world is different, and there are many of them, they are scattered. Therefore, at present, the ninja world is not able to implement a set of chakra measurement standards based on years. Moreover, the battle between ninjas is not purely a chakra, but a game of ninjutsu and wisdom to stand in the end. It is precisely for this reason that this method of measuring the amount of chakra in the age is not widely used at present.

According to the calculation of the amount of chakra in the chronological method, although the world was only twelve years old and began to cultivate at the age of three, she had the amount of chakra that an ordinary ninja practiced for forty-five years. And, as the world ages into puberty, her chakra volume will increase dramatically. Of course, this growth of chakra still depends on the supply of food. Then, the world, which is getting bigger and bigger, finds that the food it carries for a year may not be enough for a year. So, unsure when her lost chakra will return, she decides not to gamble! For her now, having mastered the new chakra cultivation method, she has a better chance of returning to her own world.

"That's ······!" Looking at the stone tower in front of me, the world murmured. Although she didn't know whether this stone tower was the goal she was pursuing, the throbbing of her heart told her directly and clearly. Then the world came to the stone tower thirty meters away and stood still, and just watched it. Just imagine, in such a lifeless place, there is a stone tower with obvious traces of man, is it very strange. So, Liding and the world thirty meters away took out a sword, ready to test it. For the world, prudence is the only way to survive.

"Whoosh~whoosh~", the world came with two shurikens at the stone tower. Then she stood still for a while.

Then, nothing happened, and everything was the same. And in the chakra perception of the world, there is only one chakra around her. However, the more harmless existence there is, the more cautious the world becomes. So, she slowly pulled out the short sword behind her back, and walked to the gate of the stone tower step by step.

The architectural style of the stone tower is very in line with the environment here, and the round tower body can effectively avoid the wear and tear of the wind and sand.

"Wait!" The world came to the tower with some surprise. It turned out that because the world was far away from the tower before, she was a little negligent about the material of the tower. From a distance, the tower looks like stone, but up close, you can see that it is made of sand.

So, with the mentality of giving it a try, the world picked up the chakra and punched Shata. As a result, nothing happened, and the fist of the world did not hit even a grain of sand. Then, the world thought for a moment and guessed, "Such a structure is likely to be put together using the power of the magnetic escape. Am I not the only ninja who has come here? With that, the world came to the gate of the Sand Tower, and because of the lack of chakra, the world was not ready to use the shadow clone technique to test the mechanism in the tower.

Because the height of the tower is more than 30 meters high, but the diameter is only more than 20 meters long. So, from the eyes of the world, the tower looks a bit like bamboo shoots. However, bamboo shoots are not bamboo shoots for the time being. Now the world is on the front of the Sand Tower, ready to push open the gate. The height of the gate is eight meters, and the width is about five meters, and the proportions are in line with the golden ratio, which looks relatively comfortable.

"Z~~", with the heavy sound of stones rubbing, the world slowly pushed open the door. Because she didn't know what she was going to face when the door opened, the world had some spare power when she opened the door with Chakra. Moreover, the short sword in his hand is still held from time to time to deal with all emergencies.

door, the world only opened a gap that she could just pass through herself. And then she just got in. The world had thought that the closure of the tower would dim the light inside the tower, but she was wrong, and the unknown light inside illuminated every inch of it. So much so that the world can clearly see the layout of everything in the tower.

The layout of the tower is very empty, except for the stone statue at the end of the gate, there is no other setting.

Before that, the world didn't open the chakra because it saved chakra. And now, after seeing that there is no danger around her, she is relieved to observe everything around her with the powerful vision of the writing wheel.

Of course, in such an empty tower, the most striking thing is the stone statue. So, the world slowly paced to the stone statue and looked at it carefully.

"What is this ······? Yaki Orochi!? ”