Board Thread:Theories and Speculation/@comment-1512913-20150221101637/@comment-6769189-20150224234509

Didn't she also increase gravity?

Also, the Rinnegan requires the chakra of the Sage of 6 Paths chakra. While the Sharingan doesn't, so if they can get the Sharingan without it, then they shouldn't need it for the Rinnegan. Basically here how it works. Rinne Sharingan= Kaguya+Shinju OR Kaguyas chakra and body.

Rinnegan= Sage of 6 Paths chakra

Sharingan/MS/EMS= Uchiha chakra/body