Testing the Blade, Bloodline Limit First Trial

The next morning.

After breakfast, Mo brought Shisui to the woods near the Naka River to train as usual.

However, even after Uchiha Mo checked Shisui's training results and gave him the appropriate guidance, he had not noticed anyone watching them from the shadows. He did not rush things, though, and simply began his training step by step.

After telling Shisui to train on his own, Mo walked up to a centuries-old tree that took two people to encircle and slowly gripped the black hilt at his waist.

"Whoosh—!"

With a crisp sound like clear spring water flowing, the gleaming blade slowly slid out of its sheath.

He held Futsunomitama in a standard grip across his body, his indifferent black eyes falling upon his reflection in the straight blade.

"Let's test the sword first."

As soon as the words fell, Mo raised the straight sword and slashed diagonally down at the tree!

"Thud!"

He had not used much strength—merely the force of an ordinary slash. Yet Futsunomitama sank entirely into the trunk, nearly cutting through half of it before finally stopping.

The corners of Mo's lips lifted slightly as he pulled the straight sword back out.

Even without chakra coating it, a normal strike possessed such power. It was enough to show just how sharp Futsunomitama was.

Next, Mo tightened his grip on the straight sword, took a deep breath, and narrowed his eyes as he activated the chakra within his body.

"Shriek—!"

Accompanied by a piercing eagle cry, dazzling lightning instantly covered the gleaming blade.

Unlocking the "Thunderstorm" ability allowed Mo to shape Chidori as freely as if he were molding clay. Whether it was Sasuke's Chidori-based techniques or Kakashi's Lightning Cutter-based techniques, he could use them all with a single thought.

And what he was using now was precisely the Chidori Blade.

Mo rotated his wrist, almost instinctively ensuring that the entire blade remained aligned with the direction of the strike as he exerted force. Then, he swung Futsunomitama diagonally at the tree before him!

"Thud!"

Mo dropped to one knee, the sword tip angled toward the ground, while the tree in front of him slowly began to shift.

"Crack—crack—crack! Boom—!"

The thick tree crashed to the ground. Mo rose to his feet, sheathed the straight sword, and curled his lips into a faint smile.

Judging from the test results, Futsunomitama's sharpness was at least no weaker than the Kusanagi Sword in Sasuke's hand. And when both were used with the Chidori Blade, its sharpness was even greater.

Perhaps Thunderstorm's enhancement of Lightning Release had played a role, but the obvious gap could not possibly be bridged by that factor alone.

With such sharpness, even without chakra in a conventional taijutsu battle, an enemy's weapon would rapidly lose durability upon clashing with Futsunomitama and break after only a few exchanges. And if chakra were added, ordinary ninja tools would likely be severed in an instant, without any suspense.

Having gained a rough understanding of it, Mo began considering another matter.

That was developing a new Bloodline Limit based on Lightning Release and Fire Release!

Lightning Release and Fire Release were the two most unstable of the five basic nature transformations, possessing both explosive force and immense burst power. There were many Bloodline Limits in the ninja world based on Fire Release and Lightning Release, such as Lava Release, Boil Release, Explosion Release, Scorch Release, Storm Release, and so on. Yet there had never been a Bloodline Limit created by fusing Fire Release and Lightning Release.

Trying to fuse these two most unstable nature transformations into a new Bloodline Limit was no different from dismantling two highly unstable bombs and assembling them into one even more powerful bomb! Never mind the difficulty—the cost of failure alone was more than ordinary people could bear.

The reason Mo was considering this was because he possessed both the abilities of "Fire Control" and "Lightning Manipulation," granting him absolute control over the form transformations of both Fire and Lightning Release. Combined with Chidori, such a versatile "vehicle" that provided an entry point, the idea became feasible. And if he succeeded, then in the future, merely training this new Bloodline Limit would directly improve his proficiency in both nature transformations. The efficiency would increase enormously.

No sooner thought than done. Mo immediately extended his left hand.

"Chidori!"

"Shriek—!"

Brilliant lightning burst forth, and surging lightning serpents danced wildly across Mo's left hand.

Next, Mo slowly began controlling the Fire Release chakra within his body, condensing it...

"Scarlet Scorch: Chidori!"

Mo gave a low shout, and the lightning in his palm suddenly began to change!

The blue electrical light quivered wildly, gradually shifting toward a blood-red hue as the temperature of the arcs rapidly rose.

Only a few breaths later, Chidori had completely turned blood-red. The arcs seemed to have caught fire, their surface glow faintly carrying the texture of translucent flames as they swayed with the wildly dancing lightning serpents. At the same time, surging heat waves spread from Uchiha Mo's palm, warping even the surrounding air!

Feeling the violent power in his hand, a bead of cold sweat slid down Mo's temple.

"What violent power! Is this the technique's complete form...?"

Even as the controller of Scarlet Scorch: Chidori, Mo was genuinely startled by its power. What he held in his hand did not feel like a ninjutsu at all, but rather a runaway hundred-ton truck—except this terrifying monster was somehow moving in the right direction.

Shisui had been practicing swordsmanship nearby. When that terrifying chakra aura erupted, he jumped straight up from where he stood, every hair on his body standing on end!

He used the Body Flicker Technique to put more than ten meters between them before turning back toward Uchiha Mo.

After watching for a while in trembling fear, Shisui swallowed and shouted with immense resentment, "Nii-san! Could you warn me in advance the next time you research a forbidden technique?!"

Mo did not respond. At some point, his eyes had turned into three-tomoe Sharingan. He stared intently at the technique in his hand, sensing the state of the chakra within his body.

"The degree of Fire Release chakra nature transformation... the degree of Lightning Release chakra nature transformation... the ratio of the Fire-Lightning attribute mixture..."

Mo stood frozen in place like a statue, recording every aspect of the fusion between Fire Release and Lightning Release within his mind with all his focus.

After an unknown amount of time, when the chakra in his body had finally run dry, Mo stopped channeling chakra, withdrew his Sharingan, and sat cross-legged where he was, closing his eyes to gather chakra.

Another half hour passed. Once Mo felt he had recovered a certain amount of chakra, he impatiently opened his eyes and began experimenting again.

Following the information he had recorded earlier, he controlled his Lightning Release chakra and Fire Release chakra, recreating their one-to-one convergence within his body. Yet something strange happened.

Mo had clearly perfectly replicated the chakra conditions within "Scarlet Scorch: Chidori," but when lightning and fire met, there was not the slightest sign of fusion...

"Th-This... what exactly is going on... Why does the technique work, but I can't fuse them on my own...?"

Mo furrowed his brows deeply, unable to figure it out no matter how he thought.

"Is it because Chidori's shape transformation is rather special?"

"..."

"No, a kekkei genkai is merely the fusion of two chakra nature transformations. It has nothing to do with shape transformation..."