(I'm French...so...i'm Sorry for my bad writting)
Well hello everyone !
after a few theory of the Yang Release, i think i can make more speculation about the other face of the coin: The Yin Release !
we know that Yin Release can affect the reality to create form out of nothingness. In fact, it can disturb someone by affecting on the perception that he has of the world....that's we call Mental Ninjutsu (or Genjutsu).
but the Yin Release can also give consistency to something that did not originally. The Nara's Hijutsu allow them to make their shadow tangible (and posses mystic power of mimicry) Or play with the spirit of someone (literally). The Yamanaka's clan can switch their spirit with their victim and can interact with their body.
And, like we see with the possibilities of Yang Release to be used with other Chakra Nature to give a new Nature (Doton+Suiton+Yang = Mokuton); we can think that it's the same with the Yin Release ! it can change the structure of the Nature to create a variant.
Thereby, If we Mix Doton+Yin , that can make the Steel Release (Koton) because metal is a material specific to the earth. Same thing for Katon+Yin, that can make the Scorch Release because of the black flame that the user can move freely with his mind (Enton).
And that will explain how Jiraiya and Toad can make Oil if they mix Suiton+Yin. It will be the same thing for a person who want to make Ink like Killer Bee (but Bee don't need any transformation of his Chakra because of his link with Hachibi...who is half-octopus)
If we Mix Suiton+Futon+Yin, that can make the Cristal Release (Shoton) on the part of the crystallization process (that can explain why nobody have ever use this Nature of Chakra like the Mokuton).
well....what do you think everyone ?