Board Thread:Spoilers!/@comment-26159109-20151007195419/@comment-1732287-20151007215548

The first thing I thought was Snow and Charming since they have one heart split between them...

Then I thought maybe Emma will sacrifice her own heart for the power; or a part of it. Since the Dark One blade (evil) and Excalibur (good) are two parts of a whole; perhaps this is where Rumple's new pearly white heart comes into play. If Emma combines half of her presumably dark heart with half of his light heart, throws it into a cauldron or something; maybe she'll be able to get excalibur. Just rolling with imagination there.