Chapter 16: The link to the shadows
The first component of the seal was to continuously drain the yin natured Chakra which will be stored in the seal on the forehead until the yin natured chakra in the body is 80% of the yang natured, the constant drain through the forehead will boost his clansmen's mental prowess as well, and there will be theoretically no limit as its designed to work the same way the tailed-beasts are turned into Jinchuriki. The unbalanced 20% of the Yang natured Chakra will circulate throughout the body in a way that it will give the seal carrier a healing factor equal to an Uzumaki.
This allows Nara to be faster and with more abundant and constantly growing reserves as well as a backup reserve along with a healing factor. The next component is adding Natural Chakra, with the balanced Yin and yang the bearer will have no problem attaining Sage mode, and the body will constantly be in that state until they want to activate its effects externally, which theoretically should double the battle prowess. What's most important is that it removes the need for hand seals, as the perfect union is how things were meant to be.
For security, the seal prevents any talk about Clan secrets in the presence of anyone without a Link to the shadows seal, and it also places the mind in a black fog, causing illusions, mindwalking and even Sharingan mental manipulation ineffective. It also allows psychic communication with anyone with the seal and also tracks the bearers.
For techniques when the seal is placed, there will be an information overload of theory in proportion to the content that the bearer can handle. And it is only theory because with the seal a Nara's imagination is the only limit to using Darkness and shadows, the theory will just open the mind to the possibilities, Shikamaru already placed Shadow sense, Shadow step and Shadow history as techniques he developed into to the Nara collective mental archive, which will record every new technique made and each seal bearer will be able to access it.
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