Maybe Regina will go on a tantrum-like rampage and go squeeze a number of hearts in her vault. That might take several people down, without taking out a main character. At this point I am becoming tired of the hype and just want to see the story.
It occurs to me if Emma couldn’t see August’s leg, then she would not have felt Graham’s empty chest. To her they are both humans, not FT characters, so she sees and feels what she believes to be true.