Darkness took over in a whole new way on Once Upon a Time’s Season 4 finale, and it wasn’t just heroes becoming villains.
The two-part finale took viewers on a journey through The Author’s new world where Regina and Snow White switched roles, then back to Storybrooke, and finally to a new twisted reality where Emma is the Dark One.
After decades of Snow and Charming battling to save Emma from darkness, she became the ultimate Big Bad, sacrificing herself in order to save Regina and the rest of the town.