randomitemdrop:

Item: Corn Brooch

• Once per day, the wearer can utter the command phrase “Corn me up good!”, magically creates 3d12 ears of corn, but the command must be spoken loudly and clearly.
• Corniness: grants the wearer the ability once per hour to tell jokes so incredibly corny they make people dumber for hearing them, dealing 1 Wisdom damage to all that hear (and comprehend the language the speaker used). However, the wearer loses three points of Charisma for the next hour, since that’s what happens when you go around telling jokes this bad. (Optionally, instead of limiting its use to once per hour, the DM can decide that anytime the player can come up with a sufficiently corny joke, they may make use of the effect.)