Quote Originally Posted by Lauront View Post
Refer to this and this on that topic. The sources are contained in the first link, and are all vague. It's not the second set of sacrifices and Azem was never intended to be a part of them - no source points to that, anyway. It is worth noting that even after the WoL re-tells their understanding of events in Elpis, she does not understand why she'd become Hydaelyn and oppose her people. It is only with the context of Meteion and the fate of the other worlds (especially, the Plenty) that this decision later makes sense to her. As per Vyrerus's post below, all indications suggest that to her faction, this was a pretext to buy her time/gain support, without truly spilling the beans, allusions to which exist in the Anamnesis scene.

Unfortunately that post-Elpis cutscene really muddies the waters. It makes it seem as though she enacted the Sundering during the second set of sacrifices, when they still hadn't been completed to restore the star to a functioning state. With that said, the scene is not literal in nature, and even during the Q&A Yoshi was referring players back to earlier scenes, like the Anamnesis Anyder one, and the totality of those sources do not point to plans for interminable sacrifices but one final set to restore/release those in Zodiark.
Nicely put. For those who struggle, the red words are links to actual sources.