Better Thunderclap

You clap your hands, emitting a peal of thunder. Each creature within 20 feet of you takes [roll]8d4[/roll] thunder damage and is deafened for [roll]1d8[/roll] rounds, or it takes half as much damage and isn’t deafened if it makes a successful Constitution saving throw. On a saving throw that fails by 5 or more, the creature is also stunned for 1 round. This spell doesn’t function in an area affected by a silence spell. Very brittle material such as crystal might be shattered if it’s within range, at the GM’s discretion; a character holding such an object can protect it from harm by making a successful Dexterity saving throw.