If it were any other ninja tool, with Yubi's standing in the Village, it wouldn't be hard for him to take it for himself.
After all, he was the one who discovered this ninja tool.
However, given the military music dream's special effects on the battlefield, its value was on another level.
This was a factor that could determine the outcome of a battle, meaning that with it, the Hidden Sand Village would have more confidence when facing other Villages... As such, the higher-ups would surely want it to be 'kept' by the Village rather than an individual.
Of course, just how much power this ninja tool could unleash on the battlefield... still needed to be tested in actual combat.
That opportunity... soon arrived.
Yubi had killed dozens of Iwagakure Ninjas alone; naturally, Iwagakure couldn't stomach this insult.
After confirming that Yubi had fled back to the Land of Wind, Iwagakure immediately gathered their army and launched an offensive against Sunagakure.
The sentries reported that the number of Iwagakure was estimated to be over a thousand.
Since Yubi was promoted to captain of the Medical Team, the scale of the battlefields he participated in had grown from two or three hundred people to several hundred, requiring him to command and deploy several Medical Squads on the field.
The coordinating combat units were no longer the size of a small squad, but a whole battalion.
But a battlefield of over a thousand people... he had not yet experienced.
"Move out!"
After receiving the news, Sunagakure immediately began combat preparations and headed for the border under the leadership of Commander-in-Chief Shimizu.
Iwagakure came with aggressive momentum... In this great battle, Overall Commander Shimizu would surely have to take the field personally.
Before long, the two armies met on a desolate Gobi desert, facing each other from a distance.
By then, it was already close to dusk.
The Ninjas of both armies were spread across the land like dense black dots on the left and right; the cold wind whipped up floating sand, filling the air with a sense of grim solemnity.
Neither side made a move immediately.
"Mountain Hero... bringing so many people into my Land of Wind, are you prepared to die?"
Shimizu stood at the front of the army, stepped forward slowly, and looked at the man who had also stepped out from the opposing formation, speaking coldly.
Mountain Hero... was indeed the commander on the Iwagakure side.
The two were old acquaintances... and knew each other well.
"Don't delude yourself; our Village is just using you for troop training... Do you really think your Sunagakure has the ability to contend with our Iwagakure?" the man opposite laughed loudly.
"Attacking at this time, and with such fanfare... completely without hiding your tracks, and seemingly without any combat plan or prior preparation; this doesn't seem like your style." Shimizu's tone was sarcastic. "What is it? Being in such a hurry... are you here for revenge?"
Hearing this, there was a moment of silence from the other side.
"Ah... I remember now. It seems... one of our Sunagakure people wiped out a group of your Iwagakure people yesterday... Tsk tsk, strange. Is it your Iwagakure training troops, or is our Sunagakure using you for practice?"
Shimizu's tone was not only smug but also quite provocative.
"Hahahaha..."
Many Sunagakure in the ranks joined in the laughter, creating quite a roar.
This scene made even Yubi raise an eyebrow.
He didn't expect this Overall Commander to have such a side... so unlike his usual serious and composed self.
"..."
Sure enough, as soon as those words were spoken, the atmosphere on the Iwagakure side became a bit more oppressive.
"Kill!"
Then, without another word, the Iwagakure commander immediately roared.
Immediately, the two armies moved across the land like a swarm of locusts, quickly converging.
"Yubi's safety is in your hands!"
As the battle began, a captain turned to instruct Itō and Sasori, then rushed toward the enemy lines with the crowd.
It went without saying that once the battle reached a fever pitch, Yubi would likely face frequent underhanded attacks from the enemy.
To Iwagakure, besides Yubi's inherent aggro aura, once he used the ninja tool to interfere with the Iwagakure army on a wide scale, the opponent would immediately react and prioritize killing him.
Therefore... someone had to be specifically assigned to protect him.
The sight of deafening explosions interwoven with various Ninjutsu instantly filled the eyes.
Yubi's eyes were lowered as he stood in the center of the Sunagakure formation, slightly toward the rear.
Immediately, he blew into the ninja tool, military music dream.
The invisible flute music swept through the air like a tide, creating ripples invisible to the naked eye among the two forces.
The Iwagakure who were still charging and engaged in hand-to-hand combat with Sunagakure's front line instantly became stiff in their movements; whether it was attacking, defending, or dodging, they all made errors.
Their reactions slowed down significantly, allowing Sunagakure to find opportunities and ruthlessly cut them down.
Some were interfered with by the melody... while others were directly hypnotized and fell headfirst to the ground.
In contrast, the Sunagakure people became impassioned; upon hearing the flute music, their will and emotions for combat were stirred, and their morale soared.
"What's going on?!"
"Is this... Genjutsu?"
In the Iwagakure ranks, Mountain Hero's pupils constricted.
He immediately looked toward the source of the sound.
However, the scene was somewhat chaotic, and he couldn't find the perpetrator at all.
"It's the Genjutsu cast by that Yubi!"
A Sensor Ninja instantly rushed to his side and said hatefully.
Because their position was relatively far back, not at the very front where the two armies clashed... they could hear some of the music and their internal Chakra was somewhat restless, but the impact was minor.
Those severely affected were the Iwagakure who had been the first to charge.
"That brat!"
Upon hearing Yubi's name, Mountain Hero also showed murderous intent.
He was also somewhat uncertain and surprised.
Clearly a Medical Ninja, yet he possessed terrifying combat-oriented methods... and now, he could cast such a wide-range area-of-effect Genjutsu?
How did he do it?
From his experience, even the top Genjutsu masters couldn't cause such interference across such a large number of people and area in such a short time on the battlefield.
Moreover, it wasn't just Genjutsu; through observation, Mountain Hero keenly noticed that the combat level of the Sunagakure troops had also strengthened due to their heightened emotions.
The Iwagakure in the front were falling one by one.
The power of this Genjutsu wasn't particularly exaggerated, but its range was too vast.
Fighting while interfered with, the Iwagakure charge squads simply couldn't perform at their normal level... Facing Sunagakure's Spearhead Squads, the entire battlefield defensive line was like paper, being rapidly cut down and pushed back.
"Have the other teams spread out; don't cluster together... The enemy's Genjutsu is transmitted through sound waves, so the distance it can reach is limited."
"Yes."
"Also, use long-range Ninjutsu and attacks to target the area where Yubi is located to stop his Genjutsu. Use Ninjutsu to destroy the terrain, disrupt the Sunagakure ranks, and cover Hongo and Yuji as they penetrate deep into the Sunagakure forces to prioritize taking that guy out..."
Mountain Hero said in a low voice.
"Yes."
The Sensor Ninja, upon hearing this, immediately flickered away.
"Such a wide-range Genjutsu, regardless of how this kid activates it, the Chakra consumption must be enormous. Given his age, he probably won't be able to hold it for long..." Mountain Hero judged privately.
Then, he immediately took the nearby personnel to fill the gaps in the front line.