Capítulo 36: Chapter 36: Hundredfold Yin Seal
Hattori was thrilled because he knew just how powerful the **Yin Seal** technique was!
The Yin Seal was a sealing technique originally developed by the Uzumaki clan, who specialized in seals. Its strength lay in its ability to let the user store massive amounts of chakra within their body, enabling them to suppress and seal even a tailed beast!
After the Senju and Uzumaki clans allied, a woman brought the Yin Seal to the Leaf Village. This woman was none other than the First Hokage Hashirama Senju's wife and the first Jinchuriki of the Nine-Tails—Mito Uzumaki!
After Mito's death, her granddaughter Tsunade inherited the Yin Seal and even enhanced it with a powerful new technique, the **Strength of a Hundred Seal**. The Strength of a Hundred Seal's power lay in its ability to fully release the Yin Seal, allowing the user to tap into a vast reserve of chakra and perform large-scale and forbidden jutsu.
Because chakra floods the body, the user's physical strength, stamina, and healing ability all get a massive boost. Paired with Tsunade's forbidden jutsu, **Creation Rebirth**, even life-threatening injuries could be healed instantly!
This is nothing short of a godly technique.
As the leading medical figure in the Leaf Village, Tsunade set three strict rules for medical-nin.
**Rule One: A medical ninja must never abandon treatment until their comrades are dead!**
**Rule Two: A medical ninja must never stand on the front lines!**
**Rule Three: A medical ninja must never die before any of their teammates!**
Many people knew of these three rules, but few knew that a fourth rule existed, one that Tsunade set on top of them all—
**Only a medical ninja who has mastered the Strength of a Hundred Seal and Creation Rebirth is permitted to break all the rules above!**
Such unshakable authority!
Such a fierce presence!
Putting Tsunade's fiery personality aside, the fact that she could say this openly demonstrated just how powerful the Strength of a Hundred Seal and Creation Rebirth were! So, when Hattori unlocked the **Yin Seal and Strength of a Hundred Seal**, he couldn't contain his excitement.
"With this, I'll never have to worry about running out of MP again! And now that I have the Yin Seal and the Strength of a Hundred Seal, surely Creation Rebirth can't be too far off!"
He was itching to use the Yin Seal immediately to gain experience and level up. But as he looked at the skill description, he quickly calmed down.
"The description says that the Yin Seal can open a chakra reservoir from 10 to 100 times my MP. But it'll also automatically siphon off 10% to 100% of my MP daily to fill that chakra pool… This is a tricky trade-off."
According to the description, choosing a tenfold chakra reservoir would have the least impact on him. And with ten times the chakra, he could still turn the tide of a battle with smart usage.
But Hattori wasn't satisfied.
"If I can get 100 times, why settle for 10?"
A hundredfold increase in chakra would be beyond massive—almost like the chakra of a tailed beast!
However, there was a steep price to pay for such power.
For Hattori, recovering his full MP through regular nighttime sleep wasn't enough; he'd need an additional five or six hours during the day as well.
So if he chose to open a hundredfold chakra pool, he would need to ensure he got extensive sleep daily and avoid using MP carelessly while awake.
This wasn't easy for a shinobi in a time of war. Hattori thought it over for a whole day after returning to his quarters before finally making up his mind.
"Screw it. Go big or go home. I'm going for the hundredfold pool. I'll just treat military food pills as my main meals from now on!"
His MP was almost fully restored, so after making his decision, he activated the Yin Seal.
"Opening a hundredfold MP chakra pool, Yin Seal—Seal!"
As he cast the technique, Hattori immediately felt a surge of energy gathering in the center of his body, while his MP began to drain.
Luckily, the drain rate was slow—roughly one point every two minutes.
And every time his MP dropped by one point, an experience notification popped up.
**[EXP +5]**
Seeing this, Hattori couldn't help but grin.
"Wow, that's some low EXP!"
When he used to bandage others, he'd earn ten points each time. So, this five-point gain was the lowest he'd ever gotten for a single action.
Still, it was a relief.
"Doesn't matter how much—at least I'm getting experience. Plus, at this rate, I can still recover MP in between."
After a bit of mental math, he realized he restored about one MP per minute while asleep, and the Yin Seal drained one MP every two minutes.
This meant that as long as he slept for half of each day, his MP restoration would match the drain.
Best of all, as long as the Yin Seal continued to drain his MP, he would gain experience even while sleeping!
Realizing this, Hattori couldn't help but laugh out loud.
"Haha, gaining experience while lying down—is this what they call 'winning by doing nothing'?"
He laughed, and the burden of the Yin Seal's MP drain felt a bit lighter.
After laughing, Hattori glanced at the Leaf shinobi passing outside his tent, feeling a pang of nostalgia.
"The Leaf Village is nice, but it's still enemy territory. Staying here any longer will eventually get me exposed. Plus, with my current 'weakened state,' I'd better not push my luck!"
With that in mind, he decided it was time to return to the Sand Village.
He waited until nightfall to avoid attention, slipping away from the Leaf shinobi under the cover of darkness and making his way into the Land of Rivers canyon.
Since he had summoned Katsuyu the other day to treat Leaf shinobi, they fully trusted him, so he managed his escape smoothly.
Entering the canyon, Hattori carefully avoided the ambush spots set by Akisame and his men, taking a different route through the gorge to reach the Land of Wind.
He was familiar with the area, so he easily navigated past the Sand Village's stationed troops and returned to the medic tent.
However, as he crept into his tent, a sudden flash of fire illuminated the pitch-black space, revealing Chiyo's expressionless face.
"Hattori, where have you been these past two days? Why are you only returning now?"
"Σ(°△°|||)︴"
Seeing Chiyo's blank stare, Hattori's lips twitched, and he struggled to find a plausible excuse, eventually forcing a sheepish grin.
"Heh… well… care to take a guess, sensei?"
Chiyo: **(╬￣皿￣)**
*(End of Chapter)*
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