Necromancy?

[JeanneOrnitier]

Just FYI, necromancy isn't only Voidsent possessing a corpse. There's also alchemy-based necromancy like what was used in the Ul'dah-Sil'dih war.

[Enkidoh]

Just FYI, necromancy isn't only Voidsent possessing a corpse. There's also alchemy-based necromancy like what was used in the Ul'dah-Sil'dih war.

Voidsent can still affect biological and chemical agents though with pretty much the same effect (although it's not causing undeath, the Tonberry plague was actually a Voidsent disease spread from a Voidsent summoned by the Mhach during the War of the Magi which they contained in a vase that they gifted to the unsuspecting Nymians - unearthing the vase results in the disease reappearing in the present day, and only by destroying the vase and the Voidsent trapped within is the plague eliminated for good.).

So although the undead plague that Ul'dah unleashed on Sil'dih was alchemical in nature, it would not surprise me in the slightest if there was some kind of Voidsent influence in it's development too (it's all still very murky - the Hildibrand quests are not the best source of information given their deliberate irrevent and tongue-firmly-in-cheek tone).