Board Thread:Spoilers!/@comment-1916997-20150313202428/@comment-25355646-20150403005510

8Rob wrote: Emma sacrifices herself

https://www.youtube.com/watch?v=sEN0G2JZI6Q It looks like she is using the dagger to summon the lightning. She could only do that if she was the Dark One because she would command Rumple to summon lightning if Rumple was still the Dark One.