Booming Strikes

You create an crackling ring of dark clouds to form around each of your hands. Any time during this spell's duration that you make a melee attack with a weapon or unarmed strike a loud boom, audible within 100 feet erupts from the impact. This causes you to deal an additional amount of Thunder damage equal to 1d8 + your casting ability modifier and cause your target to make a Constitution Saving Throw. On a failure, the target is deafened for 1 minute. Creatures that are resistant or immune to thunder damage automatically succeed this saving throw. Multiple failed saving throws renew and extend this duration by 1 minute, each.

At Higher Levels. When casting this spell using a spell slot of 2nd or higher level, increase the thunder damage dealt by 1d8 for each spell slot level above 1st and increase the duration this spell applies its bonus to attacks by 1 minute.