Board Thread:Spoilers!/@comment-26159109-20151007195419/@comment-25926288-20151129001632

Emma's plan would work. The Corrupted Holy Grail magic would have been destroyed. Who cares is Emma would get a Dark spot because she technically can't get a dark spot and even if she did she could fix that by doing good stuff as Snow has shown.

Douing bad to save the greater good is perfectly fine. If I were her I would have done the same thing but a bit more effectively.