Going by Contagion Chronicles, I think it's the AKD.I think they're getting kicked from the main twelve, but I'm not sure what's replacing them. One of the conspiracies is too, replaced by the Council of Bones, but I don't know which one. (If I had to guess, it would Aegis kai Doru, or less likely, the Cheiron Group).
Which is fine by me, they were both morally suspect in a bad way (the most absolutely blind to nuance and also a true cult - even the Malleus Maleficarum focuses on a creature of the night that is harmful, and has a reason in that Baudolino really likes not being dead), and kind of... boring. They use Relics and seek Relics, and that's about the extent of what they are and do. They're one of the few groups the supplements made worse, because they really leaned into just how hidebound they are by their internal myth (VALKYRIE is the other one, but there's literally one problem, their need to rely on vampiric donors for funding; that is easily solved, have them have another source of income that doesn't ruin their own mission).