Type: Metamagic
Source: Drow of the Underdark
You can modify a spell so it deafens targets.
Benefit: You can alter a spell that deals damage to foes so that any living creature dealt damage by the spell is also deafened for 1 round.
The effects from multiple deafening spells do not stack. A deafening spell uses up a spell slot one level higher than the spell's actual level.