Board Thread:Theories and Speculation/@comment-30323490-20170305205254/@comment-1512913-20170307201715

Tenketsu thing, Byakugan, Sharingan, Rinnegan, Shikotsumyaku. Also it's very likely that individuals who can use combined nature transformations might be descendants of jinchuuriki, meaning they originate from Tailed Beasts, who in turn originate from Kaguya. Also she somehow merged with a magical tree, which might be the origin power of Sakon&Ukon, just more advanced. Wouldn't surprise me if all canonical kkg could be traced back to Kaguya in one way or another.