Lots of details on the Thirteenth world:
- The Flood of Darkness prevents death in the Thirteenth due to everything shifted to "activity", which implies the Lifestream is no longer functioning there (and if so, I wonder if that has any implications for Zodiark's fragment there).
- Expanding on Unukalhai's summary in from 3.3, the crisis that led to the Flood of Darkness was called the Contramemoria, where "memoriates" sealed the eidolons (primals) in memoria crystals (auracite), only for many to be corrupted by the Darkness leaking out and becoming warlords that created the first voidsent.
- Zero (Zenos's reaper avatar) is apparently a "half-Voidsent" (like Vauthry?) due to being exposed to Darkness while still in her mother's womb. Her mother was one of the memoriates who did not succumb to temptation and fought against the corrupted memoriates. Both Zero and her mother were fighting a doomed last stand before the Flood.
- Golbez has captured Azdaja, and the Archfiends were ordinary voidsent "uplifted" by being granted a portion of her draconic aether.
- Zero's domain has a callback to a certain infamous book in the Great Gubal Library if you talk to the mindflayer NPC there.
- There's an optional quest in Radz-at-Han after completing the Main Scenario that goes into Scarmiglione's and Barbariccia's backstories.
A lot of twists, especially Lahabrea sundering himself and Athena being the true villain. Though, I can't help but notice two things:
1. Hephastios enthralling the keywards and wardens is very clearly a form of intentional tempering like the primal system the Ascians taught the sundering races.
2. The manner in which Erichthonios sealed Hephastios seemed very similar to how Zero sealed voidsent into auracite/memoria. Considering what happened to many of the memoriates on the Thirteenth, and Lahabrea pocketed the soul crystal with his evil half.....