I will use the ninja world to aid my cultivation of immortality.

He leaped backward.

Naraku calmly dodged the battle axe.

boom! ! !

The red battle axe, having cleaved through the air, landed on the divine tree below.

The divine tree, which resembled a solitary mountain peak, suddenly split in two, cleaved in two by Otsutsuki-doji's battle axe.

The split sacred tree shook violently.

However, Otsutsuki Doshiki completely ignored him and instead glared angrily at Naraku, who had dodged away.

The power of the pupils burst forth, transforming into a powerful gravitational pull.

An invisible force of gravity quickly swept towards Naraku, trying to pull him back.

"Thousand Transformations - Azure Dragon Transformation!"

Despite feeling the pull of gravity, Naraku remained unmoved and instead leaped high into the air once more.

The body undergoes changes.

Naraku, having leaped high into the sky, used the "Transformation Technique" and suddenly transformed into a thousand-foot-long azure dragon that blotted out the sky.

Azure Dragon Transformation.

This change comes from the Azure Dragon Fruit.

After obtaining the Devil Fruit's energy from the pirate's avatar, Naraku not only successfully advanced the "Transformation Technique" but also mastered the transformation into a blue dragon.

Of course, it's not hard to tell from their body shape.

Compared to Kaido's Azure Dragon, Naraku's Azure Dragon Transformation, performed using the "Transformation Technique," is far more powerful.

Even his current transformation into the Azure Dragon is to use the Otsutsuki in front of him to actually test the power of the Azure Dragon Transformation.

"Hot breath!"

The enormous dragon's body hovered in the sky.

Naraku, transformed into a thousand-foot-long azure dragon, opened his mouth and spewed forth a raging inferno that would scorch the heavens and destroy the earth, directly at Otsutsuki Doshiki atop the Divine Tree.

boom! ! !

The flames condensed into a pillar of fire, instantly engulfing Ōtsutsuki Dōshiki and the entire top of the Divine Tree.

"what!!!"

Screams echoed from the flames.

A wave of fire swept across the area.

The flames quickly spread from the top of the tree down the trunk, transforming the entire sacred tree into a giant torch.

A violent repulsive force swept out from the wave of fire.

After setting aside some distance, the severely burned Otsutsuki Dōshiki soared into the sky.

"Die!!"

Instead of retreating, Otsutsuki Doshiki, who burst out of the flames, advanced and charged straight at Naraku.

He gripped the red battle axe in his hand, causing it to expand and grow to a hundred meters in size, before fiercely cleaving it toward Naraku's head.

There was no dodging.

Naraku calmly watched the battle axe come crashing down upon him.

boom! ! !

The massive battle axe cleaved smoothly onto Naraku's head.

In an instant, rolling waves of air radiated out, causing the surrounding void to become chaotic, and even the space itself rippled.

This strike was definitely a furious attack, like that of Otsutsuki-dō.

But the result was terrible.

Amidst the surging air currents, the red battle axe's blade remained on the dragon scales, yet it caused no damage whatsoever.

Even Naraku's dragon body did not tremble.

"Too weak. Such an attack wouldn't even be enough to tickle me."

With a pair of dragon eyes revealing an indifferent gaze, Naraku looked at the Otsutsuki Doshiki opposite him and opened his mouth to utter a low voice.

"what!!!"

Originally horrified that his attack had been blocked, Otsutsuki Doshiki was immediately enraged by Naraku once again.

His full head of white hair stood on end, and a massive amount of chakra surged wildly from his body.

As Otsutsuki Doshiki roared with all his might, he gripped his red battle axe with both hands and slashed wildly at Naraku's head.

Ding ding ding～～～

Sparks flew.

Amidst wave after wave of swirling energy, no matter how much Otsutsuki Doshiki slashed, the red battle axe could not break through the dragon scales' defense.

On the contrary, with each swing, the red battle axe's blade quickly cracked and chipped, requiring a constant infusion of more chakra to repair it.

He slashed hundreds of times in succession.

Otsutsuki Doshiki was still hacking away furiously, but Naraku had already given up out of boredom.

It turns out that the Otsutsuki in front of us was rather weak.

Let alone testing the power of the Azure Dragon Transformation, it can't even break through basic defenses.

Open the dragon's mouth.

Bored, Naraku stopped wasting time, stretched out his dragon head, and swallowed the berserk Otsutsuki Doshiki whole.

The magic power is activated.

Ōtsutsuki Dōshiki didn't even have a chance to scream before he was instantly refined.

However, it is different from the original Hagoromo Otsutsuki.

When he was refining Hagoromo Otsutsuki, he was too weak and the process was rushed, so he didn't have enough power to retain the crucial Rinne Sharingan.

But this time it's different.

Given the vast disparity in strength between the two sides, he had ample resources to divide the spoils.

During the refining process, Naraku did not completely refine Otsutsuki Doshiki into raw energy, but instead preserved the opponent's three-tomoe Rinnegan.

the reason is simple.

Rather than refining it into raw energy to enhance cultivation, it's more cost-effective to keep treasures like the Rinnegan with three tomoe and refine them into magical artifacts.

This can lead to a further increase in strength.

By retaining the three-tomoe Rinnegan, the amount of raw energy that Otsutsuki Dōshiki could refine was greatly reduced.

But better than nothing.

Having improved his cultivation, Naraku dispelled the Azure Dragon Transformation and returned to human form.

The magic flowed.

Naraku, standing in the void, looked down at the divine tree that had been burned to ashes.

Whether it's the Divine Tree of the Ninja World or the current Divine Tree, these seeds used to plant the Divine Tree outside are merely one-time items.

Or perhaps these one-time-use divine tree seeds are simply fissions of the original divine tree species.

The original seed of the Divine Tree is kept in the Otsutsuki clan's headquarters and is considered the Otsutsuki clan's supreme treasure.

Look back.

Naraku looked down at his right palm.

Two three-tomoe Rinnegan eyes appeared in his palm.

To be precise, it should be a three-tomoe Rinnegan, a magical artifact.

The former comes from the Otsutsuki Doshiki mentioned earlier.

The latter comes from the original three [Eternal Kaleidoscopes].

That's right.

The three [Eternal Mangekyou Sharingan] that were originally conceived have now evolved into the Rinnegan under the nurturing of even stronger magical power. They have even been further transformed into the [Three-Tomoe Rinnegan] after being refined and fused by Naraku.

Descending from the sky.

Naraku created a clone of his magical power as a protector, and then used the "Blazing Sun Technique" to first refine the three-tomoe Rinnegan of Otsutsuki Doshiki.

The benefits of projection breaking boundaries have already been demonstrated.

Like a pirate incarnate, the Devil Fruit he received allowed his cultivation to advance by leaps and bounds while he was traveling.

Until now.

He has already taken three-tenths of the journey on the path to immortality, the first stage of the Golden Core realm.