Sylvain's Tongue-Tie

Choose a target creature you can see within range. The target must make an intelligence saving throw.

On a failed save, the target loses the ability to speak intelligently, though they can still comprehend language. Their tongue is also adhered to the roof of their mouth. As a result, they cannot spells that require a verbal component unless they can somehow avoid the component through a feature.

At the end of each of the target's turns, the target can make an Intelligence saving throw, ending the spell on itself early on a success.