Board Thread:NF Noosphere/@comment-2185383-20150331104330/@comment-4080775-20150401003717

Zetsu is stated as being able to absorb and distribute chakra, and the Rinnegan is said to have powerful chakra. Since White Zetsu is able to copy people down to their appearance ans even use their unique techniqies, including KG. Black Zetsu can absorb and copy chakra so maybw it can copy White Zetsu chakra and them imitate Sasuke and summon the core from the moon to release Kaguya, thus freeing her and meeting your demands.