Board Thread:Theories and Speculation/@comment-1512913-20150609203752/@comment-3965545-20150611102729

The person is Otsutsuki it looks like and another pure Rinnegan and Byakugan user. Most likely has all killing ash bones and Giant TSB too. Probably just a bit stronger than Kaguya so she thought a whole bunch of fodder zetsu could even the difference out.