Naruto: Can't learn ninjutsu? I'll just practice immortality!

"Samadhi True Fire, rise!"

Asakawa Naoki tapped his finger, and an orange flame appeared in the air ahead.

Although the Qi Fire had not yet condensed, the Essence Fire was a flame ignited by one's own essence.

After breaking through the Qi Refining and Spirit Transformation, Asakawa Naoki's body was baptized by natural energy, and he could defeat most of the jonin with his physical strength alone.

The power of the Essence Fire naturally increased with it. Even if it was ten meters away, the terrifying high temperature of the orange flame could be felt. Once it was touched by a little spark, it would be burned to ashes.

"Go!"

Asakawa Naoki tapped his finger, and a piece of high-purity chakra metal weighing more than ten kilograms, along with several rare mineral materials, seemed to be lifted up in the air and fell into the Essence Fire.

Regardless of other materials, just that piece of high-purity chakra metal would cost more than 100 million taels, worth several Asuma's heads.

If Asakawa Naoki were to collect it himself, it would take an unknown amount of time.

Fortunately, he could directly use the chakra metal in the inventory of the Hidden Rain Village to recover some money for the talisman.

Under the control of Naoki Asakawa, the impurities burned out from the chakra metal and many ores were gradually removed, and then melted into liquid under the terrifying high temperature of the Essence Fire.

Under the control of mana, these liquids floated in the air and began to mix evenly.

With the addition of some auxiliary materials and the control of the temperature of the Essence Fire, the liquid metal began to gradually cool down.

"Condensate!"

Naoki Asakawa tapped his fingers lightly, summoned the two flying swords in his dantian, and flew into the Essence Fire together.

Under the control of his spiritual consciousness, the liquid metal quickly condensed into the same shape as the two flying swords, a total of sixteen including the two!

"Forge!"

Naoki Asakawa calmed his mind, and his powerful mana turned into an invisible hammer to hit the sixteen flying swords.

Under the hammering of the mana hammer, the strength and toughness of these flying swords gradually increased until they reached a limit.

"The next step is the most crucial!"

Asakawa Naoki retracted the fire of essence, and then cut his finger, and dropped the scarlet blood containing rich magic power on the flying sword.

The moment the flying sword was stained with blood, a killing intention that made people tremble came.

As the forger of the flying sword, Asakawa Naoki would naturally not be eroded by this killing intention. He stared at the flying sword, and his fingers lightly drew in the air, as if writing, or drawing.

At the same time, some lines began to appear on the surface of the flying sword.

As Asakawa Naoki's magic power was gradually infused, the lines on the flying sword became more and more, and gradually formed the first complete line.

At the moment the first complete line appeared, the killing intention of the flying sword soared, and the surrounding air seemed to become as sharp as a blade.

The first restriction, "sharp", greatly enhanced the sharpness of the flying sword!

Since the first restriction was successfully engraved on the flying sword, these flying swords can be called "magic weapons", which are the weapons of immortal cultivators.

After the first restriction was engraved, the speed of the flying sword's pattern growth did not decrease but increased, and soon the second complete pattern was formed.

At the moment when the second complete pattern appeared, the sword body of the flying sword remained the same, but it gave people a light feeling.

The second restriction, "speed", greatly increased the flying speed of the flying sword.

Following closely was the third restriction, "hardness"!

It is not enough for a weapon to be sharp. Once it is not tough enough, it is easy to collide with a gap or even break directly.

With the "hardness" of the third restriction, it can ensure that the flying sword is not easily damaged.

The three restrictions have been completed, and these sixteen flying swords can be regarded as top-grade ordinary magic weapons. Mortals holding these flying swords may be able to defeat some cultivators in the realm of refining essence and transforming qi.

However, Naoki Asakawa waited until now to refine the flying sword, so it is naturally impossible to stop now!

"Go!"

Asakawa Naoki increased his mana infusion, and the new mysterious patterns seemed to be engraved on the flying sword by an invisible hand holding a carving knife.

Under the urging of mana, the new patterns gradually became complete, but its speed became slower and slower, as if it would stop in the next moment.

Once the engraved patterns stopped, the fourth restriction would fail. Even if there was only a slight difference, the sixteen flying swords could only be half-step spiritual grade magic tools.

Not reaching the spiritual grade, even if it was half-step spiritual grade, it was still a common magic tool.

Asakawa Naoki was able to make a three-pattern common magic tool half a year ago. In the past six months, he has never slacked off in terms of restrictions.

Due to the material of the talisman paper, he could not refine the four-pattern talisman for the time being.

But the materials of these flying swords were more than enough to carry four restrictions!

"Give it to me, refine it!"

Asakawa Naoki once again offered the Samadhi True Fire, and beads of sweat began to appear on his head.

Refining sixteen flying swords together does put a lot of pressure on me.

But ifIf they were refined separately, these flying swords would not be able to form a coordinated spirituality, and they would need more effort to practice the sword formation in the future.

Fortunately, under the refining of Samadhi True Fire, the patterns of the flying swords began to take shape rapidly, and the fourth restriction was finally successfully engraved on the flying swords.

At the moment when the fourth pattern appeared, the sixteen flying swords seemed to have their own consciousness and began to shake, as if they wanted to break free from Asakawa Naoki's control.

The fourth restriction chosen by Asakawa Naoki is also the key to the flying sword's leap from a mortal magic weapon to a spiritual magic weapon, which can make the flying sword produce a spiritual restriction "spirit"!

"Want to escape?"

Asakawa Naoki's mouth slightly raised, although his mana was insufficient and his spiritual consciousness was consumed greatly, he was quite happy in his heart.

As long as the sixteen flying swords that reached the quality of a four-pattern spiritual weapon can be successfully driven, their power may not be weaker than that of a five-pattern or even a six-pattern spiritual weapon flying sword.

Asakawa Naoki was a bit tricky. He couldn't refine the six-pattern flying sword for the time being, but he could make up for it with quantity.

"Tongbao Jue!"

Asakawa Naoki threw out sixteen drops of blood, which dripped accurately on the flying swords.

As the Tongbao Jue was performed, the connection between these flying swords and him gradually deepened.

Asakawa Naoki could sense that the spirituality born in these flying swords, although weak, contained a strong killing intention, and they were resisting his control.

If they were allowed to grow for a few hundred years, they might really be able to give birth to sword spirits.

Fortunately, these flying swords used his blood to assist in refining the ban, and they had a certain connection with him. With the Tongbao Jue method, it was only a matter of time to refine them.

"Refine them for me!"

Asakawa Naoki increased the input of mana again, and the sixteen flying swords that were suppressed faintly could not move, so they could only be refined obediently.

But just when he thought he had it all figured out, the auras of the sixteen flying swords connected together and suddenly surged, condensing together into a gigantic flying sword that broke through his control and stabbed towards him with boundless murderous intent.