When Aervalr Bled (artifact)
Written in 773 by retired Magi and veteran of the Kartharaddi wars, Periaxis Leisistratos, the book is an analysis of the infamous events of the night of 23rd of Velde 748, of which the author was a firsthand witness of himself. Part of a legion sent deep into Kartharaddi territory at the time of the catastrophe, he describes the rapid death, and writhing agony that preceded it, of almost the entire Imperium in harrowing detail matched by virtually no other work.
He also goes on to cast doubts on the claims that the Aagiokratia's had caused the attack itself. In the two decades following the night, despite seeking information from countless Magi and higher-ups in the army, he has never actually located anyone that was aware of what would happen on that fateful day in advance - in fact, all of Aversaria's forces were seemingly caught completely flat-footed. Instead, Periaxis posits that what transpired was actually an attempt at a massive magical attack upon the Empire itself, and that the cataclysm was in fact intended for Etepezea, but failed for reasons unkown.