Shikotsumyaku is a Kekkei Genkai used primarily within the Kaguya Clan. Giving users a great degree of physiological control of their skeletons and bodies at large, Shikotsumyaku users are able to manipulate their bodies to perform superhuman feats. By taking control of their body's osteoclasts and osteoblasts through chakra, the users of this bloodline trait are able to manipulate the growth and formation of their bone matrix and skeletal system as a whole. For instance, Kimmimaro was able to manipulate calcium deposits in his skeleton in order to grow weapons and tools from his body and skeleton at will. Moreover, by manipulating their skeletons and imbuing them with chakra, users of this KG are able to harden them and increase their density. By doing so, the offensive and defensive potential of the user's attacks increase greatly. This is one of the reasons that users of this ability gain certain passives, and are generally harder to hurt, while also having somewhat of an increased 'healing' rate. Since most of the bones protrude from the skeleton, and body as a whole, the user's skin/tissue/etc tends to heal as the techniques are used. As a byproduct, since users of this Kekkei Genkai become so used to pain, using it as a way to break genjutsu becomes impossible. Primarily, this KG is used in close quarters, to supplement the user's taijutsu movements, attacks, and defenses. Since taijutsu techniques are *literally* 'body techniques', the Shikotsumyaku is considered one of the highest forms of taijutsu. In regards to the associated bloodline traits that come with it, perhaps you're referring to the more powerful 'ash-killing bone technique' that Kaguya uses? Honestly, I'm not sure on exactly how this works, but I believe it's quite similar to the Shikotsumyaku. By manipulating her skeletal structure, Kaguya Otsutsuki was able to utilize bones in the same way that users of the Shikotsumyaku are. The only difference being in that Kaguya's attacks would cause you to turn into crushed dorito dust for some reason if they landed. I'm not sure why exactly, I don't remember it being explained in the series, though I could be wrong. I believe Kaguya is the only character able to use this ability anyways though so lmao. Overall though, the Shikotsumyaku is a versatile and powerful ability that I'm excited to learn more about!Tell me about Shikotsumyaku and the associated bloodline traits that come with it.
We'll cover that quick then move onto the annoyingly repetitive canon list of techniques, grouped by type and rank.