Board Thread:Show-Related Questions and Answers/@comment-26116863-20151117024202/@comment-6175354-20151117161505

Eskaver wrote: I remeber Snow killed someone and she purified her heart. So could Emma. Not the same thing.... the Dark One's magic stems from the Holy Grail, and is once corrupted cannot be purified. All it took for Nimue to become the first  Dark One, was one act of evil. That is why Merlin had to keep himself in check, at all times. He knew the cost of weilding such power.