The Totem of Harmony is a cool little item that you receive as a reward from the quest Hatred Becomes Us in Townlong Steppes.
When you use it you will summon a Totem of Harmony at the target location, illuminating the area for 1 minute. The item has a one hour cooldown. Above is a pic of me using the totem.
This is just another one of the cool little MOP items I have been collecting. I’m gonna have to start throwing things away again soon though. I hardly have any room left in my bags!