Quote Originally Posted by Lyth View Post
When an aetheric flood/Calamity occurs, it shifts the polarity of the other shards. The known example that we have of this is the Flood of Darkness on the Thirteenth, which altered the polarity of the First.

'In an age past, the world you know as the Thirteenth was flooded by Darkness. Like ripples of water, the repercussions were felt in the other shards, none more so than here on the First. It became perilously imbalanced and susceptible to the influence of the light.' (Mitron, Shadows of the Past, Lv.80).

We know that the Second Umbral Calamity (of Lightning) rejoined the Twelfth. I'd be interested if anyone has actually confirmed which shard Living Memory is from, but I think that it makes more sense if it's a world that isn't yet rejoined (i.e. Fourth, Eighth, Ninth, or Eleventh). It's interesting to note that the Sixth Umbral Calamity (of Water), which is tied to the War of the Magi and Nym, is associated with the Tenth, because they have similar spacing to the Light/Darkness pair. If that's the case, then it could be that there was a second lightning-aspected world in the Eighth resulting from the water calamity. That's my guess for the location of Sphene's world.
This makes the most sense, honestly, and absolutely fits with the timing involved. Great catch!