The Twelve Days of Christmas--Jingle Bells

The Twelve Days of Christmas continue with another magic item for d20 System games (such as Pathfinder or d20 Modern). The text in this post is released under the Open Game License. Copyright 2015 by Steve Miller

JINGLE BELLS
This item is a pair of small bells joined together on a bright red leather strap radiates enchantment magic, and when shaken, they emit a soft, harmonious ringing sound.
   As a standard action, the user can shake the bells. All creatures, save the user, within 20 feet must roll Will saves (DC15) or be filled with a sense of good cheer and fellowship toward each other. Hostilities instantly cease and the creatures will join together in singing songs and enjoying each other's company. If anyone attacks a creature under the enchantment of the jingle bells, all affected creatures turn on the attacker.