Annihilation

Hidden a hundred meters away, Koshino would not let them down.

While staying outside the battle for a long time without acting, Koshino was merely contemplating how to help Kakashi and the others break through successfully.

When Kakashi and Guy's conversation made the surrounding Mist ninja relax a bit, Koshino's eyes flashed with determination. 

In that instant, Koshino was not one to strike often, but when he did, it was with a stunning effect.

Without any hesitation, he formed hand signs and, channeling his chakra, immediately executed the secret technique developed by his APP: the Shadow Hand.

"Whoosh!"

The shadow condensed into a tangible form, becoming a solid Shadow Hand.

While the Mist ninja, especially the injured Mist sensor Jonin, failed to notice any change, Koshino's Shadow Hand stealthily approached several Mist ninjas.

Then, just as the Mist Jonin was mocking Kakashi and the others, a sudden "whoosh" rang out!

Under Koshino's control, the Shadow Hand gripped the ankle of the Mist Jonin tightly, immobilizing him. A blue light flashed, and in Koshino's other Shadow Hand, a Rasengan was formed and gently pushed forward.

"Boom!"

A Mist Jonin, hit by the Rasengan, was sent flying.

As the Mist Jonin crashed into a tree and fell to the ground, he was dead on impact, killed by the Rasengan.

Koshino's surprise attack successfully killed a Mist Jonin in an instant!

"Well done!"

In the next moment, not only did Koshino think to himself "Well done," but even Kakashi was astonished by the perfection of Koshino's plan.

Using the Shadow Hand to cast Rasengan was the key to the success of Koshino's surprise attack plan.

During his training with the Rasengan and its advanced techniques, Koshino mastered techniques like Double Rasengan and Rasengan Throw. He could utilize the Rasengan through the Shadow Hand and Shadow Clone.

After mastering the Big Ball Rasengan and the Finger Rasengan, using the Shadow Hand to perform the Rasengan or even the Rasengan Throw became a simple task.

So, after taking down one Mist Jonin, Koshino, seeing the panic among the Mist ninja, coldly smiled.

"Surprised by killing just one Jonin?"

"Didn't you think a Chunin and three Genin could handle me?"

"Now you know what failure feels like?"

"Rasengan Throw!"

"Whoosh!"

With a cold smile, Koshino targeted the other Mist Jonin, the only real threat to Kakashi.

If he could take down this Jonin, the remaining Mist Chunin and Genin would be no match for Kakashi.

In the next second, without giving the Mist Jonin time to react, Koshino's Shadow Hand formed another Rasengan and threw it.

The Rasengan Throw, guided by the Shadow Hand, took just a second to reach the Mist Jonin.

However, even a tiny trick could work only once on a Jonin-level opponent.

"Just a little trick, thinking it would work twice?"

"Too naive!"

"Clang!"

Gripping his kunai tightly, the Mist Jonin managed to block Koshino's Rasengan with it.

Yet, underestimating the power of the Rasengan was a fatal mistake!

After all, it was a technique developed by the Fourth Hokage!

Naruto in the original series relied heavily on the Rasengan early on.

With great effort, the Mist Jonin could barely resist the Rasengan with his kunai, but under the Rasengan's immense force, he was slowly being pushed back.

And at that moment, the Mist Jonin seemed to forget about someone even more dangerous than Koshino standing right before him!

Before he could overcome the Rasengan, a sudden "zzzzz" sound echoed.

With a flash of blue lightning, Kakashi's Chidori struck!

In a swift move, the second Mist Jonin's head was severed and flew into the air.

"Koshino!"

"Target, the last Mist Jonin!"

"Hmph, understood."

Listening to Kakashi's calm command, Koshino coldly snorted, but his hand signs didn't slow down.

In an unexpected assault, two Mist Jonins were killed within seconds without any chance to resist.

This shocked the remaining Mist ninjas, including the Konoha ninjas like Guy and the others, who were equally stunned by the sudden change in the battle.

What surprised Guy, Lightning, and the others more was the subsequent cooperation between Koshino and Kakashi.

Right after Kakashi issued his command to Koshino, several shurikens flew out from the forest.

Seeing the shuriken flying in arcs, the heavily wounded Mist sensor Jonin sneered, thinking it was poorly aimed and missed its targets.

But as he was thinking this, the shuriken collided mid-air with several "clinks," and Koshino's shadow shuriken pinned the Mist Jonin and several Mist Chunin and Genin, immobilizing them.

Even an elite Jonin couldn't move under the shadow shuriken's effect. In the next second, when Kakashi's closed eye flashed red, all the Mist ninjas fell under his Chidori's deadly strike.

Watching from a distance, Koshino saw Kakashi dispatch the Mist ninja and thought to himself, his eyes on Kakashi's right hand.

"Compared to the Rasengan, Chidori really does look cooler!"