The Suspense is Killing Me

You speak to a creature that can hear you and understand your language. Nothing happens at first, but at the start of their next turn they take 1d4+1 psychic damage and must use their entire turn to make a Charisma (Persuasion) check against your spell save DC. On a success, you tell the creature the other part of the sentence and the spell ends. This continues for either 1 minute or when they succeed, although you can end the spell as a bonus action by telling the creature the other part. 

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the spell uses an additional d4+1 psychic damage for each slot level above 1st.