So, usually when a heart is removed a person can be controlled and if the heart is squished it causes death. Pan has Henry's heart now. Wendy says Pan will be immortal, all powerful and Henry will die. Is there a specific reason other than his 'Truest Believer' status and the fact the Wendy said this in 'Think Lovely Thoughts' that he would die? I was wondering if the death is caused by his heart being inside of another person. For that matter, can someone donate their heart to another (say Regina puts her heart inside Henry) to save another?