Board Thread:General Discussion/@comment-25491743-20180422150252/@comment-25926288-20180422151544

I fear that the true answer is: It's after the first half was planned and ideas changed.

Episode 10: "I put Mr. Gold in a box inside my head."

Post-Episode 10 : Mr. Gold is reverting due to use of dark magic, despite having used a lot of dark magic over the course of 5 seasons in Storybrooke, Neverland, Land of Untold Stories, and the Underworld.

Episode 10: "Let me grab my wand." Said by Zelena, but didn't use a visible wand.

Post-Episode 10: Zelena took Robin's magic.

Anyway, maybe the Dark Curse skin applicant expires after 50 years.