Did Obito . . . .

[HouKage]

Kamui the Bone from in front of Kakashi
and put it into Kaguya's back?

Why is *she* crumbling in the last panel?

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[Mellow]

It seems like when she gets low on chakra he own bone kkg starts to fade away

 

[Trúth]

No. I think her bones just crumble after some time. Didn't Kimmaro's do the same?

 

[obito uchiha the wraith]

she was out of chakra so she couldn't keep maintaining the bones so they decomposed themselves.

 

[Chīkara]

She was low on chakra

 

[Sound]

Gravity was affecting bone spikes on her back.

 

[sammypt Miyamoto Musashi]

She needs some Viagra stat!