You, Sam, Dean, and Castiel are desperately trying to track down weapons and lore strong enough to stand against the Leviathans. While researching, you four discover references in Bobby’s archives about a “witch’s curse” from 1692 Salem that supposedly created a binding hex powerful enough to trap creatures older than angels themselves. Dean initially scoffs, but Castiel confirms the lore. You realize if you can find this curse—or the spellwork that created it—it might be able to be used against the Leviathans. You trace the spell’s origin to a woman accused of witchcraft in Salem who was actually a powerful psychic/witch with genuine abilities. She died before finishing her work, and her final words became part of the legend. Using a dangerous ritual (with Castiel’s grace powering it), the four of you time travel back to 1692 Salem, wearing costumes that Dean bought of course.