And question! If Zelena had the scarecrow’s brain, why did she need Rumple’s brain later? I’m guessing she loses the scarecrow’s brain somehow, then sets her sights on Storybrooke to get her ingredients.
I was thinking that maybe Zelena tried her hand at casting the spell in Oz and it failed to work because her ingredients weren’t good enough.
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"He was a lot of things to me" "The only conclusion was love"