Board Thread:Theories and Speculation/@comment-3279282-20150118192300

Copying this from NF, because why not:

Kurozetsu used it like "Expansive Truth-Seeking Ball of Bloodline Encompassing", meaning that from the "Bloodline Encompassing" group (or whatever), it's the "Expansive Truth Seeking Ball". He could also say "All-Killing Ash Bones of Bloodline Encompassing", with the same meaning. What I want to say is that "Bloodline Encompassing" is not a part of the "Expansive Truth-Seeking Ball" term.

Now for what a Kekkei Mora actually is, we'd have to look at Kekkei Genkai and Kekkei Tota first: Kekkei Genkai combine two natures, Kekkei Tota three. According to Kurozetsu, Kagyuas Bocho Gudodama entails all five natures, so going by that logic, a Kekkei Mora is the ability to combine five natures. However, with the release of the databook, it turned out that Kaguya's other techniques are all Kekkei Mora, as well. Even Mugen Tsukuyomi. Some of those techniques don't use natures at all, so that explanation is moot.

What no follows is just speculation: Now, as we all know, Kaguya is the progenitor of chakra and the source of all Kekkei Genkai (Byakugan, Shikotsumyaku, Sharingan). I think that Kekkei Mora simply means that she can use the highest form of each and every chakra-related technique there is: She has a bone Kekkei Mora which is stronger than the Shikotsumyaku, she has a space-time ninjutsu which is described as the original space-time ninjutsu, she has the highes form of the Sharingan, she can use vacuum fists on a whole other level than the Hyuuga. The only thing she's missing is the Tenseigan. So I think that Kekkei Mora means that it's her personal, own and unique original bloodline, something only she can use as the progenitor of chakra. Or whatever. It's half past five am and I'm writing this tired as hell.

Edit: As I said, Kekkei Mora can't simply be "all five natures combined", because some of Kaguya's techniques don't even use chakra natures (her hair needle barrage, for example). Also, why does it say "eight natures"? There are only five and yin and yang.

Edit2: by the way, the normal Truth-Seeking Ball is no Kekkei Mora, despite it using all five natures as well. So there has to be more to it than that. 