The area affected by the peace aura spell is warded against violence. An almost audible hum fills the area, calming the nerves and emotions of those who enter. Any creature attempting to strike or otherwise attack anyone within the warded area (including attacks with targeted spells) takes 1d6 points of force damage per caster level. Any creature with the evil subtype suffers a -4 penalty to its saving throw. Peace aura is frequently cast prior to large meetings where the discussion is expected to become heated, or in sacred places where fighting of any type is unacceptable.