Sakurai the Cursed
I'll quote my post about it in the "A New Student' design notes thread:
Oh, the book was added a while ago, but no one really picked it up for a discussion, with makes Verly a sad cat!
Well I mean, I read it as soon as it came out and it's very interesting, but it's so filled with elements we know nothing about that it's hard to draw any useful conclusions from it. So the Infernals and Celestials partnered up, in a war seemingly against the Elemental Lords? That doesn't really tell us much of anything. The idea that Mana is made up of threads was a very interesting point, but not sure what practical use it had before
this quest revealed one very unique person who could make use of that.
Although actually, now that I think about it, could Ehr'Ishin be part of the civilization that produced the Manaphages? And perhaps the firing of this Exalted superweapon could be the event that damaged Lore and the reason (or part of it) that the Lords cannot come to Lore as Ash mentioned in the lore thread? Mabe it even caused the Fissure. Or does Elemental Plains refer to what we know as the Elemental Planes (or a place therein)? That's what I had assumed when I first read it, honestly.