You throw a tiny spark at a point within range where it erupts with a bright flash and thunderous bang which can be heard 600 feet away. Each creature in a 10-foot-radius sphere centred on that point must make a Constitution saving throw. On a failure, a creature takes 2d8 thunder damage and is blinded and deafened for 1 minute. On a success, a creature takes half as much damage and isn’t blinded or deafened. A creature can repeat this saving throw at the end of each of its turns, ending the effect on itself on a success.