Board Thread:Naruto Discussions/@comment-945885-20140820060530/@comment-9782468-20140820231922

ShaRin'negan94 wrote: Jashin Uchiha wrote: How does Kaguya know about Amaterasu? Did Indra have it?

Indra actually could have it, since Sasuke is a transmigrant of him. The other question would be: When did Kaguya see him (Indra) using Amaterasu ? ^^

Probably BZ let her know at some point