"Let's move somewhere else. If I teach you Monster Strength here, I'm afraid I might end up destroying your house."
After putting away her bankbook, Tsunade clenched her fists, producing the popping sounds of her knuckles cracking. She looked eager to smash things violently.
So off they went, making their way to a training ground just beyond the village.
Half an hour later.
BOOM!
A tremendous explosion echoed through Konoha's forest. The earth shook violently, sending flocks of birds flying out from the trees.
In the training ground, the surface had collapsed into a large bowl-shaped crater. The surrounding area was cracked extensively in all directions like a spider web.
Such terrifying destruction made one wonder whether a giant had punched the ground with its fist.
Yet this crater was created by someone less than 160cm tall—a woman weighing under a hundred pounds.
"See it for yourself. This is the Senju Clan's Monster Strength."
Tsunade pulled back her punch and proudly patted her chest with a self-satisfied expression.
You wouldn't believe such power could come from someone who looked so delicate—unless you saw it yourself.
But Heiyan knew this Yang Release energy hid inside Tsunade's impressive figure, transformed from highly refined physical energy.
My grandfather always said there were two key steps to truly mastering Monster Strength.
The first step is precise chakra control—by channeling chakra through special pathways, you gather massive amounts of chakra in specific parts of your body.
The second stage is all about technique—releasing all that chakra in an instant. It creates explosive bursts of air strong enough to blow through walls and floors. That's why we named it Monster Strength—it's pure, unstoppable force.
Tsunade explained carefully.
Then she generously shared all the details about Monster Strength chakra channels and striking techniques with Heiyan.
Monster Strength was the result of generations of the Senju Clan exploring, learning, and refining their knowledge.
It was a Yang Release jutsu combined with taijutsu, refined over countless years.
And just like that, Heiyan dove into mastering Monster Strength.
[Multiple Shadow Clone Jutsu!]
With his hands crossed in an X-shape, he created nine clones, making exactly ten people including his original body.
For Heiyan, controlling ten shadow clones at once was just right.
On one hand, each clone possessed sufficient chakra for Monster Strength practice. On the other, when clones dispersed, the returning memories and training experiences remained within his mental tolerance limit.
Tenfold efficiency.
Creating more or fewer shadow clones would reduce effectiveness.
Thud! Thud! Thud! Thud! Thud!
In the training ground, ten Heiyans kept practicing Monster Strength, throwing punches repeatedly while producing dull booming sounds.
Whenever a clone dispersed due to chakra exhaustion, Heiyan instantly replaced it to keep the number steady.
As experience returned from the clones to the main body, Heiyan's mastery of Monster Strength visibly improved at an astonishing rate.
"To train like this...?"
Watching nearby, Tsunade stood there wide-eyed in shock.
At first, she had believed Heiyan trained with the forbidden Multi-Shadow Clone technique for combat. Now it seemed he had already decided its purpose from the very beginning.
However, Heiyan's training method was far beyond what she could hope to replicate.
Hours slipped by—one, then two, then three—until sunset gave way to night.
Before anyone realized, the hour had grown quite late. Moonlight bathed the training grounds in silver light.
"Release!"
Heiyan felt it was enough and dispelled all the Shadow Clones at once.
Instantly, experience from the nine clones returned to his original body. A flood of memories surged through Heiyan's mind, making him dizzy and staggering backward several steps.
"Are you alright?"
Seeing this, Tsunade rushed forward in one swift step from behind and steadied him.
"I'm fine."
Heiyan regained his balance, rapidly sorting through all the returning memories within his mind. Then, under Tsunade's astonished gaze, his entire aura suddenly transformed.
"Could it possibly be…" Tsunade took a few uncertain steps back.
Boom!
A powerful gust of wind suddenly erupted around Heiyan's body. Then, crouching low, he threw a punch straight into the solid ground.
Crack!
The surface instantly caved inward, forming a massive bowl-shaped crater over half a meter deep and several meters wide. Countless stone fragments were sent flying into the air before raining down with a continuous 'swoosh-swoosh' sound.
This strike surpassed even Tsunade's Monster Strength in sheer power.
"Did I just imagine that?"
Tsunade murmured, unable to believe her own eyes.
Consider how she herself had taken over two years to master Monster Strength during her youth. Yet Heiyan had trained right before her eyes and completed it in only half a day. Furthermore, he wasn't even part of the Senju clan.
Such a scenario clearly exceeded everything Tsunade understood.
At this moment, Heiyan withdrew his fist and stood upright.
As someone who possessed the Sage Transformation, he carried the strongest Yang Release talent in the entire ninja world. Even the Adamantine Sealing Chains technique hadn't taken more than seven days to master.
Thanks to the Multi-Shadow Clone technique—which amplified his efficiency tenfold—he'd compressed five full days of Monster Strength training into just half a day.
Considering Heiyan's natural talent, such speed was actually quite reasonable.
Naturally, viewed from an outsider's perspective, it was still utterly shocking. It took Tsunade quite some time to recover from her stunned reaction.
She realized now that whatever happened around Heiyan simply defied ordinary logic.
Whether it was the unexplained illness he'd suffered, or the massive chakra surging within him after recovery, or even the terrifying talent he displayed now—it all remained inexplicable.
Perhaps… this is what separates true genius from the rest.
Unable to make sense of these phenomena, Tsunade finally gave up trying to understand.
Rather than dwelling on such mysteries, she preferred to focus her efforts on studying gambling techniques.
So, when they exited the training ground and returned to the village, Tsunade eagerly parted ways with Heiyan. Clutching the 30 million ryō prize money she'd just won, she hurried off toward the casino, brimming with excitement. Looks like another all-night gambling session lay ahead.
On the streets, the night had grown deep. Pedestrians grew scarce, and soft lights flickered dimly along the lane.
Heiyan strolled leisurely, enjoying the gentle evening breeze as he made his way home.
For him, today had been crazy-busy but totally worth it.
It all kicked off in the morning. Heiyan was summoned by the Third Hokage—promoted to Chunin and given the Thunder God Sword, once wielded by the Second Hokage. Then he spent most of the afternoon mastering both [Multi-Shadow Clone] and [Superhuman Strength].
Heiyan remembered a saying from his past life: "A person can change drastically in just a short time—one must always keep an open mind."
And yet, for him, only a single day had passed, and his power had skyrocketed again.
He wasn't going to stop now.
Next up was training in Storm Release.
With [Multi-Shadow Clone] backing him up, he could develop his Storm Release ten times faster, allowing him to achieve his very own Kekkei Genkai as quickly as possible.
Before he knew it, Heiyan had already reached his doorstep.
Huh?
Suddenly, he felt eyes watching him from behind.
Who could it be?
Heiyan calmly walked toward the courtyard, mind racing through possibilities.
His first thought went to the rogue Mist ninja from two months ago, led by Kurokawa. They had also secretly watched him, plotting to kidnap him for money and murder.
Although Kurokawa was dead—his body burned remotely through some Ninjutsu—the real puppeteer behind everything had never shown themselves.
Have they finally tracked me down?
At that thought, Heiyan's gaze turned icy cold. He braced himself for battle.
Bang!
He stepped into his three-story home, shut the door, and vanished.
Sure enough, a sneaky shadow crept out from the corner of the street.
Just then—
Swish!
A burst of golden light tore through the air, vanishing more than ten meters in an instant toward that figure.
"It's me!"
Startled, the shadow cried out in alarm.
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