Celenia D10 System CD10: Spell: Fibbing Frog

The witch touches the lips of the victim while reciting the spell. From that moment and until the moon turns full, the victim cannot tell a lie without a black, slimy frog emerging in their mouth and forcing its way out through their lips. However, the victim can resist the spell by adding +6 difficulty to their Bluffing check when trying to tell a lie. If they succeed, they tell the lie without any frogs.

If they fail to tell the lie, the victim may instead attempt to swallow the frog. They must then make a mental save against 6. On a perfection, they swallow the frog and will just feel a bit nauseated. If they succeed the save, they have swallowed the frog unnoticeably, but will appear visibly unnerved and sick. If the save is a fail, the frog is swallowed, but the victim visibly gags and may possibly throw up. If the save is a fumble, they swallow the frog, but will violently vomit it back up.

The victim is in no way compelled to speak. They may opt to refuse talking at all. The spell only activates on trying to tell a lie, not avoiding to speak or withholding the truth without actively lying.