Much has been written of the Eidolons--Guardian Forces, as they are sometimes known. Of their power and timelessness, of their sometimes humanlike quirks, and of the great costs of using them. Esthar scientists say the part of the brain responsible for junctioning them also commands memory; the summoner who calls on them does so at the cost of his or her own past. But rumors persist of occasions when use of them has instead granted memories. Memories of other times, other places, other lives. Whether or not these memories belong to the summoned or the summoner has never been satisfactorily determined, but one must fall back on the wisdom of the ages which tells us: The Eidolon knows not only who you are and have been, but also who you will be.

What would change about the Song if the Chocobros and the Royal Guards were reincarnated into the world of Westros?

Nyx wakes up on an alien world, the imprint of the Ring of the Lucii burned into his finger. It's still not the weirdest thing that's happened to him in the last twenty-four hours.