Verse of vulnerability

You sing or speak a haunting verse that unsettles the mind of a creature within range. Choose one creature that can hear you. That creature must succeed on a Wisdom saving throw or suffer disadvantage on the next saving throw it makes before the end of your next turn. While affected, the creature also has disadvantage on saving throws against being charmed.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, you can target one additional creature for each slot level above 2nd.