Board Thread:Character Discussion/@comment-26340222-20151116200610/@comment-5679696-20151116203122

No, I think Rumple was pretty much mortal. The problem here is, in my opinion, that Rumple is not Nimue. Not an Original Immortal. He has inherited her Darkness, and the Holy Grail's magic and immortality, but perhaps some of it was lost when Nimue died?

Perhaps Nimue would have been able to have her magic cross the borders between this land and the land without magic, and that much power got reduced when her darkness passed into the following Dark One.

Or perhaps Dark Magic is not strong enough as Light Magic, and that's simply why Merlin can do some stuff the Dark One's can't.