Naruto 606

[Akatsukidude101]

I think spiral zetsu is involved somehow in the fight witth the fourth, I'm sure the foruth would have able to tell it was obito on some level by his chakra, unless obito learned some sorta chakra masking technique or how to erase it like karin. Plus if I remember correctyly both his hands fell off like zetsu goo during that battle.