Booming Spell (Metamagic)

You can cause deafening noises with any spell.

Prerequisite: Ability to cast a spell with the sonic descriptor

Benefit: You can use this feat to affect any spell that inflicts damage. Upon a failed save, the target must make a Fortitude save against the spell’s original Difficulty Class or be deafened for 1 minute, in addition to the normal damage. Spells with this template gain the sonic descriptor. If the spell already has the sonic descriptor, the Fortitude save is required even upon a successful save. A booming spell uses up a spell slot of the same level as the spell’s actual level.

Special: A spell affected by this feat will not function in magical silence. For example, a booming fireball would not function in the area of magical silence, dealing neither sonic nor fire damage to creatures in the area of silence. In addition this feat will not work on a spell without a saving throw.