Black Fairy says that when she finally wins the Final Battle, she would have unchecked power and be able to change the very laws of magic. She even manipulates Mr. Gold by saying that she can bring Baelfire back from the dead. But it is not known how much true this is as she never won the battle. ("The Final Battle Part 2")
Light was born and Darkness followed And then the war began. For eternities
the two battled: Clashing in a sea of endless war, their emissaries raged in perfect balance: Light versus Dark: Good versus Evil: With every moon, they were born, fought and died at each other's hands: This is how it was. This is how it was. This is how it will be for times: But when the Greatest Light awakens the Final Battle can begin. We will know this great light as a warrior born of these heroes and a love. ("The Final Battle Part 2")
After the Black Fairy translates the page, she says that she understands from the page that "The Darkness can't snuff out the light, only the Light can snuff out the Light.". However, there's no indication of that in the transcript.("The Final Battle Part 2")
Hook describes the battle between Jack and the giants as the "final battle". However, neither battles are connected to each other. ("Tallahassee")
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