Whisper

You subtle muddle the thoughts of a creature within range. Target creature must make a wisdom saving throw. On a failed save until the end of your next turn the next attack made against the creature is made with advantage and deals an additional 1d4 psychic damage on a hit, ending the spell.

At higher levels: This spell's damage increases by 1d4 when you reach 5th level (2d4), 11th level (3d4), and 17th level (4d4).