Quote Originally Posted by Theozilla View Post
All the Role quests have to occur prior to Meteion’s defeat since her “song of oblivion” is what causes people who fall to despair to have their aether decay and transform them in Terminus Beasts, and every Role quests features individuals transforming into regular Terminus Beasts during the present narrative itself, not just past events like the Blasphemies.
I kind of got the notion that a Blasphemy being around causes more Terminus beasts just by general proximity to them and their actions. Kinda like how if you put a rotten apple in with a bunch of fresh ones, they all rot faster.

So if you do the tank role quest after the MSQ, the active flow of corrupted dynamis from Meteion is still cut off, but the Blasphemy that caused in the Shorud is still around, and it's still... well, infectious. Rather tangibly so in that one's case, because it's literally propagating a disease, so you can actually perceive its spread.