Cursed Ring of the Great Kingdom

This cursed magical item was originally created by a wizard who was loyal to the Great Kingdom. Though the ring has only limited power, its use to plague the diplomats of the Iron League is well known. The first time you wear this ring, you get a Curse. Though you can immediately remove the ring, the Curse remains. Until the Curse remains, you have disadvantage on any Charisma check. The Curse can be removed with a remove curse spell or greater magic.