Personally I think the finale might be more “epic battle” because while I suspect our heroes will think they’ve defeated Hades in 520 (also his centric), he’ll come back (how does one kill a god?) in 522/23 to do something dastardly to SB that brings about a cosmic war for the finale. Perhaps he brings “Hell on Earth” and Emma must not only face down Hades, lord of the Underworld, but also his Walking Dead; the former Emma casts back into Hades and the latter Emma saves and sends off to some Heaven-y type deal.
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"He was a lot of things to me" "The only conclusion was love"