Dissonant Resonance

You play a magically amplified discordant note. The note vibrates at a frequency targeted to damage a specific creatures nervous system. Choose up to five creatures within 30 feet that can hear you. Each creature must make a constitution saving throw.  On a successful save, the creature takes 3d8 thunder damage and is deafened for 1 round, the spell then ends for that creature. On a failed the creature takes another 2d8 thunder damage on the start of each of their turns, and their movement speed is halved. For at long as you maintain concentration, the creature may repeat the constitution saving throw at the end of each of its turns.