I think this is a new reveal, probably from 2×2, which we know will have a flash-back to FTL of how Regina met Rumpel, and presumably Cora, the miller’s daughter. It’s been theorized we’d learn how Regina learned magic. Well, take a look at Cora holding what appears to be a book of spells.
It looks like the same one Regina was holding in filming shots from 2×1. So, presumably, Regina inherited or stole her mother’s book of spells! 😮
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"That’s how you know you’ve really got a home. When you leave it, there’s this feeling that you can’t shake. You just miss it." Neal Cassidy