Description
Choose one creature within range that you can see or hear. The target must succeed on a Wisdom saving throw or become cursed for the duration of the spell. When you cast the spell, choose a topic of conversation. While the target remains cursed, whenever it attempts to speak about the chosen topic, you, or this spell, a phenomenon of your choice spills forth from its lips instead of words:
Attempts to circumvent the curse by writing about the subject result in crude drawings of the chosen phenomenon. If the target can communicate telepathically or another creature reads its mind, it can communicate about the curse that way.
If you have caught the target in a lie, or if it was rude or ungrateful after you granted a request from it, the target has Disadvantage on its saving throw, the spell doesn't require Concentration, and the effect is permanent unless removed by Remove Curse, Greater Restoration, or similar magic. You can also choose to end the spell by using an action to dismiss it.