User blog comment:Flashfire212/The thing with Guy.../@comment-209421-20110109031502/@comment-209421-20110109072132

Ok, I'll try to explain what I mean. For a Kekki Gennai like the Sharingan, Byakugan, Rinnegan or even that bone thing used by Kimimaro, you could pick a family that the trait is passed down through. For example, I made the Knuckles Clan the primary users of the Sharingan. Once that is set, then only people from that family can directly inherit that ability, the others have to be given it or have it stolen. And yes, that could also change the genetic structure, so you may end up with multiple families, all with the Sharingan if you wished. The two families my friends and I have given powers are the Knuckles Clan, as mentioned above, and the Mephiles Dynasty, who for the most part have to be transformed to use the Byakugan, the one that family has. As for things like Storm Release, Melt Release, Boil Release, etc, you decide which advanced element it is closest to, like Boil Release could be a Steam technique here, and then just alter it so it fits into steam. Alternatively, you could make the Release type an advanced element in itself, where more than one family can learn it. The same could go for Hidden Techniques.