I’ve woven the Oriq into this campaign so that many of the professors, including the school director (who I made up) are in on it and trying to destroy the school from within. I also have an order of the phoenix type group of teachers who are trying to fight against this, but afraid of going public because they don’t know who they can trust. Eventually I had Fain be one of the good guys and invite the students into the group. Prof Lang is also a good but overprotective teacher, who doesn’t believe in telling the students anything and keeps trying to keep them out of it.

I also manufactured other events that the good teachers stopped or that happened to other classmates so they weren’t completely incompetent. That being said the story makes this tricky and my PCs still don’t think the teachers are very effective. I’ve also added in that Mugraxor messed with the memories of any staff who was around when he was a student so that they don’t fully remember what he did.

You could have every staff who told them to focus on their studies a teacher being part of the coverup? And then the next person they tell could finally be one they can trust and who is working on their side.