Sacred Haven of Debauchery

What arguments could there be here?

They didn't have anything similar (it's common knowledge, note!) due to the conflicts between the masters and, I draw your attention to this, the presence of their own temple guards. But life is quite difficult for "non-mages" there, because at any moment they might resort to violence.

I don't think the temple guards knew about anything more.

Well, perhaps her nature wasn't as strongly displayed there. But this doesn't change the fact that a mage who has undergone torture can practice blood magic.