Thaddeus's Thunderous Bells

When casting this spell, you speak an invocation into the fist sized ball, ringing a bell attached to the lid of this sphere. Then hurling it into the crowd and plugging your ears to prevent it's effect. 

When casting this spell, make a ranged spell attack, on a hit the target takes 1d4+ spell casting modifier of bludgeoning damage. As well as the target and those within 10 ft of them must make a Constitution saving throw, on a fail they'd take 3d10 thunder damage and become deafened. if they succeed they take half and are not deafened. 

When casting at higher levels, the radius expands by 5ft, and the damage increases by 1d10 per spell level. The maximum radius however peaks at 30 ft.