On the plus side, anyone interested in trying to learn about new forms of magic. Anyone who is concerned about the expanding temporal power of the Catholic Church but doesn't want to head to the wilderness.
On the other side of this, access to temporal authorities for the OoS may be less appealing- after all the Latin temporal authorities are the crusaders, or their immediate descendants. And while the OoS are allowed to be court mages unlike the OoH, they are not allowed to weild temporal power themselves, which OoH can, so maybe this truce would not work out so well after all, especially if this creates a stronger connection in the OoS between the OoH and the crusades.
Perhaps a situation where they are talking about peace, in part because of concerns about Gheingas Khan...
So onward to covenants, I believe I am going to require that all covenants in the Levant take the Felicitous tribunal boon, since the tribunal is more focused on providing for the common defense than in fighting over resources, but each covenant must also take a hook of either the hedge tradition major external relations hook or rival if hostilities have escalated. Forbiden boons and hooks will include Centralized kingdom, ruined covenant, heretics, and missing expedition. Not because covenants aren't ruined or expeditions haven't gone missing but simply because there really isn't anything mysterious about it and surviving resources would be non-existant.
So beyond these tribunal wide limitations, what are people thinking of for covenants?