Swear Fealty — Make a player conversion immune permanently.
Just my suggestion, I think the player (that swore fealty) that the MM/CL tries to convert should get a message saying, “A member of the Unseen/Cult tried to convert you last night, but you swore fealty to the Blue Dragon.”
At its current state, no one knows the guy is conversion immune but the GK and the MM/CL (after they attempt to convert), and the GK doesn’t get notified if and/or when SF worked. This can confirm a GK and a BD or an EK could use it after he uses Allies on an Unseen member and tells him about it.