Tongue's Hex

You choose a creature within range that you can see, and hex them and their ability to communicate. The target must succeed on a Charisma saving throw or speak absolute gibberish and be totally unintelligible for 1 minute, or until they are damaged. While cursed in this way the target is not able to waylay information to anyone/anything, including spoken word, writing, hand motions, or facial expressions.

In order to cast cantrips that require a verbal component, the target must make an Intelligence saving throw or be unable to make out the mantra required for the incantation. If the creature isn't able to cast their cantrip, they can instead use their action to do something else. Once they successfully make either saving throw, are damaged, cast a spell of first level or higher, or this cantrip's duration runs out, this cantrip ends.