Board Thread:Spoilers!/@comment-1916997-20150313202428/@comment-1894786-20150506065043

I still don't understand how Maleficent's revival didn't break the laws of magic, but Rumple's and Ana's (the only other two resurrections) make sense. Rumple is the Dark One, as long as there exists Darkness in the world, there must be a Dark One. And a life for a life seems like it would be a pretty dark price to pay to resurrect a Dark One. As for Ana, her life was meant to continue, so she was given Well of Wonders water to revive herself with.

Mother Superior wasn't really dead for long, so she was easily revived when separated from her shadow, the Safe Haven's subjects weren't really dead or alive, they were just... undead, and aside from those cases, I can't really think of any other resurrections.