Naiburenkin

A Kekkei Tōta (血継淘汰; Literally meaning "a selection of blood inheritance" or "Bloodline Selection")known as Naiburenkin (内部錬金, lit. Internal Alchemy). This bloodline is the product of a joint breeding program between Kumogakure and Zuigakure. It is a product of over 150 years of research in genetic hybridization.

Background
In an attempt to assemble a bloodline equivalent to the Sage of the Six Paths, Kumogakure, known for kidnapping children of coveted bloodlines, instituted a program of research towards merging several distinct kekkei genkai. They initial experiments were a failure, resulting in hundreds of deaths. They turned toward Zuigakure, a village renowned for elemental medical ninjutsu. A bargain was struck and together these two villages embarked on a journey only recently completed.

Genesis
5 distinct bloodlines came together: Kaguya Clan, Juugo's Clan, Kurama Clan, Ukon & Sakon's Clan, and the Uzumaki Clan. Sōma no Kō provided the key breakthrough to create human chimera. A human chimera is human being with multiple genetic profiles. Normal human chimeras result from fraternal twins merging in the womb. When ever a merger proceeds beyond a state of conjoined twins then a human chimera is born with one twin subsisting as symbiotic or parasitic tissue within the other twin. In this case, the Sōma no Kō created chimera possess the DNA of these five clans. Each clan's tissue exists as components in the larger organism, yielding distinct types of chakra that run the gambit from yin to yang to a form of sage chakra. In the organism these chakras form a gestalt that gives birth to a brand new ability.

Ninjutsu
The user is capable of Yin–Yang Release (陰陽遁, Onmyōton) within the physical body. Yin on the left side of the body; yang on the right side of the body. This ability grants cellular level control to freely alter the physical form in ways similar to the ancestral bloodlines. A user can generate bones from any body part, create numerous shapes and weapons from the flesh, heal injuries almost instantly, and warp the density/structure/ composition/kinetic energy of the physical form. Any physical manifestation of this power turns black from being saturated in the user's will.

Genjutsu
The Onmyōton range, however, does not extend past the body, except when in contact with external objects and then only in a limited fashion. For this reason, the final granted ability is a form of tactile genjutsu. When engaged in hand to hand combat with an opponent, yin-yang chakra releases into the victim upon contact. This causes the opponent to hallucinate and take actual physical damage. While Sharingan users and Jinchuuriki are capable of dealing with the yin chakra, the yang chakra still harms the body, disrupting its normal functioning.

Users
Jungcheon Goguryeo