Aura of Eldath's Peace

The smoke that comes out of your pipe creates an aura of peacefullness trying to convince everybody in your immediate surrounding that violence and hostility is not the solution
to whatever feelings they are experiencing at the moment.
Each non-friendly creature (vs the caster) in a 30-foot radius around you must succeed on a Charisma saving throw to avoid being affected by the Aura. 
Affected hostile creatures become indifferent, affected indifferent creatures become friendly (not charmed) for the duration of the spell. 
Friendly creatures just experience and enjoy the peacefull atmosphere
When an affected creature is attacked, the effect immediately stops and the creature becomes immune to the effect for the duration of the spell. 
When the spell ends, the creature returns to its former mood, unless the DM rules otherwise.