Board Thread:General Discussion/@comment-25926288-20160425010026/@comment-25926288-20160426233740

8Rob wrote: And how did Cora know where Zelena was?

Last time she saw it, she left baby Zelena somewhere in the Enchanted Forest

How in the world did she know Zelena went to Oz? Tornadoes seem to always go to Oz naturally. So, likely she found it in a book.