Tongue Twister

You speak a sentence to a creature that can hear you, and the target makes an Intelligence saving throw against your spell save DC. On a failure, your mixed words befuddle them, and they are unable to speak, use any abilities that require speech or language, or cast spells that require verbal components for the duration.  At the end of each of its turns, the target can make another Intelligence saving throw. On a success, the spell ends on the target.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, you can affect one additional creature for each slot level above 3rd.