Board Thread:Spoilers!/@comment-3398493-20151020121310/@comment-24674051-20151020134448

Creators have said that Rumple has no magic at this point.

And I don't think that Killian is DArk. In fact I think just the opposite. Just like the Apprentices wand needed both sides of the coin, I think Excalibur needs both sides. The Darkness from Emma, and the Light from Killian. Gold is Emma's puppet (at least for the moment), which is why he's fighting Killian. (On top of which, Gold and Killian have a 200+ year old feud that has never been fully resolved.