Charlattan's Chatter

You begin a distracting and incessant conversation with a creature you can see within range that can hear and understand you. That creature must make a Wisdom saving throw. If the target is a creature that you or your allies are fighting, it automatically succeeds on the save.

On a failure, the target suffers a -10 penalty to Wisdom (Perception) checks and to it's Passive Perception score in regards to anything other than you, and it can't willingly move to a space that is more than 15 ft. away from you. 

The spell ends if the target takes damage, you can't talk to it anymore, or if you end your turn more than 15 ft. away from the target.

Using a Higher-Level Spell Slot. You can target one additional creature per level of spell slot above 1.