Board Thread:General Discussion/@comment-5817180-20151005041824/@comment-24674051-20151005150211

I don't think it's a dark curse, at least not in the sense of the curse that Regina (and MM) cast. The cost for those curses was, among other things, the heart of person you love most. Since Both Hook and Henry appear to be alive, this can't be the Dark Curse.

However, I would say that it's on the same order, since it apparantly brought ALL of Camelot to Storybrooke, not just the Storybrooke residents. And the 6 week memory gap.