Board Thread:Character Discussion/@comment-72.222.205.235-20130513063250/@comment-189.128.199.39-20130514032134

If someone look closely, Henry is a magical scale: He's the son of the son of the Dark One (who commands powerful magic), while his mother is the product of an act of true love (the most powerful magic of all). Both types of magic are very strong, although on opposing sides of the chart. Henry may be able to wield both, and because of that he is the undoing of the Dark One, as he may be the only being who can overpower him.

I also like the theory of him being magic's undoing, since it seems that the next antagonist is so powerful even Rumple is afraid of him. And how powerful someone can be to make an immortal sorcerer tremble?