Why is all of this important? It is because of Emma. After having this look back of this episode it now makes sense when Jefferson and Gold both elude to the fact that she is more powerful than she actually knows. Storybrooke or FTL, Emma after birth and all of that combining of kingdims; if they are in control of 4 kingdoms, is a combination of 4 kingdom’s worth of magic. Someone said while Snow was still pregnant a similiar point. Rumple said so. Jefferson bring in the magic part. The main source of the magic is the wardrobe, that’s why it was important that she drink from the well with August. Drinking from the well restores something that was once lost……her magic. She never used it because she never knew and even when told did not believe. The drink is symbolic, the book was restored and actual, restoring her magic. or triggering it. .. via water. from well.