Board Thread:General Discussion/@comment-25536775-20170510235618/@comment-5106672-20170513031737

I guess that depends on the effect she wants the Curse to have, which we're yet to see. As others have pointed out, we've seen many variations on the "original flavour" curse, so who knows? Maybe this particular curse didn't need the heart at all?

Also, by now I've learned to just roll with the current episode without asking too many questions: it's pretty clear internal consistency has long since stopped being a pressing matter to the writers.