Boom Ball

A 5 ft. radius sphere of pure condensed air waves appears within range. Its epicenter must be outside a creatures space. Creatures inside the sphere must make a constitution saving throw to take half damage. Creatures that can hear have disadvantage on the save. Creatures with tremorsense are stunned until your next turn. All creatures within the radius take 1d10 force damage and 1d4 fire damage. This spell gains another 1d10 and 1d4 per level over its normal cast level.