Board Thread:Spoilers!/@comment-24304025-20150202171011/@comment-25355646-20150304112610

I think Zelena's powers are strong enough to exist in the LWM with the pendant (that's why Walsh was a flying monkey in 3x12). But Rumple is powerless outside of Storybrooke because the Dark One's Curse originates from another world (Blue Fairy said this in 1x19) and that realm that the curse originates from is within the Vault of the Dark One.