Looking over how many types of mythical swords there are, I noticed that there is a good amount of plotting that can be done with them, here is my idea for a plot, any GM is free to use it or simply draw inspiration from it for their own games.
We have Six Swords:
Three Swords of the Cross, two Swords of the Fairy and the Warden's Sword.
Now, gathering all this power into one place for one purpose means that some heavy mojo is going down, I'm talking Heinrich Kemmler level bad.... Or at least that was my first thought. Then I realized I could do better then just bringing a dead dude back to life, why not have the issue threaten the whole of reality?
What if the Outer Gates have simply opened too far? Outsiders were slipping through with greater and greater frequency with chaos and panic in the streets, both on the Mortal and Supernatural side of things? What do the Swords have to do with all this you might ask?
Consider what each Sword represents. Summer's Fire represents universal growth, life, the blaze of heat and warmth. Winter's Frost represents death and decay, cold and darkness. They are born of forces that consist of roughly a third of reality itself. Likewise the Swords of the Cross each represent the collective Faith, Hope and Love of all Mortalkind, while the Warden swords represents the forces of magic and the cosmic power of the universe being used for justice and duty. Pretty heavy stuff, huh?
What if, in order to close the Outer Gates once and for all, you needed to SACRIFICE these weapons? Not just a conventional "I give this up so this can happen" sacrifice, the kind of sacrifice that means that those tools can NEVER be used or even MADE again!
Think on the gravity of that for a second. The Knights of the Cross would lose one of their only weapons against the Denarians, the Fey would lose a significant amount of leverage over mortalkind with the loss of the Knights, and the Wardens would have a much rougher time dealing with Warlocks and The Circle, not to mention all the other nastiness out there.
What could possibly be the upside of that? How about the Outer Gates being closed, not just now, but Forever? No amount of knowledge and ritual can open them again, regardless of how much power you pour into it. You have saved the world, the Nevernever and the whole of creation from Outsider threat for all time.
Was it worth it?