Just to clarify: Aerta College was destroyed in the first act, forcing it's resident to move to Deathold (Which under Pylia's rule became the Twilight College). This is important because the Twilight College is pretty much the "Emergency" secondary school in case the first one is destroyed. In the even that Aerta is destroyed or we have to expand, Deathold/Twilight must also exist. Unless this time around we've already refurbished Deathold... But that may potentially remove a lot of the things that made it different from Aerta (Like evil rituals that were commonplace there, like the whole "Sacrifice students for Angels" ordeal). I don't suppose you could explain what exactly happened to the two schools?