With the absolute success of grafting the kekkei genkai, theoretically capable of even being fixed in the genes and passed on to offspring - but this needs to be confirmed by practice - I set about experimenting with suitable bone properties to grow internal armor, similar to that of the captured Kaguya, but naturally not as crude and primitive. Am I an Iryonin or what?
Theoretically, such a defense, constantly backgrounded with chakra, is able to protect even from a blow with any weapon, but here it is necessary to keep a balance, so as not to lose in speed and long days of experimentation, which I did not have yet.
So, the first thing I did was to protect the most vulnerable points, like the heart, neck and spine, where it was not a problem to build up small bone shields, not visible from the outside under a layer of muscle. As a rule, well-trained assassins aim for these areas to ensure that their enemies are incapacitated. It was only a couple pounds overweight, but I was much more survivable.
Then came the turn of organs, the most important for any man... Well, now my balls can stab nuts and even the strongest blows will not leave barren. By the way, it's not as rare an injury for shinobi as one might think at first glance - when I was working at the hospital, I got such injuries regularly.
- Boss, those science guys are asking for you," Kaguya distracted me from my self-improvement with a kanpeki ningyo Kaguya, appearing out of the movement seal.
- Huh? What the hell are those weirdos up to? - I sighed, canceling the Shosen Jutsu (Mystic Hand) that I'd been using to track the growth of new bones.
I could feel the bones, but I had to calculate how they would fit into the body and how they would be attached.
- Who knows," he shrugged, "they took me away from my training and almost dragged me to call you.
- Okay, let's check it out, but if they ask for test subjects again...," Kaguya nodded and squinted suspiciously when he turned away avoiding his gaze at the last words.
Except I didn't have time to do anything else as the seal activated and we found ourselves in the lab. Before I could look around, the clones, who were waiting right next to me, grabbed me under the arms and pulled me up, dragging me into the workspace, grinning maniacally and almost shouting in both ears.
- Boss, success! A complete success!
- We did it!
- We did it!
- It's a revolution at the intersection of fuinjutsu and iryonjutsu!
- All we had to do was to utilize a few of the lessons already in the library from the time of Iyaku Fuin's creation (Last Chance Seal) and combine it with the theorizing of Orochimaru's cursed seal!
- We have completed the development of the seal, which breaks down the rejuvenation process into several stages and greatly reduces the risk of death!
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