One of the most useful and often overlooked abilities of the master cleric
is the calm spell, which can put an end to all violence in a room. Calmed
creatures will not attack of their own volition, and are at a disadvantage
in combat as long as the spell soothes their minds. The more violence
there is in a room, the harder the spell, and it is all or
nothing -- either all combat in the room is ended (with the exception of
those who are immune to magic) or none is.