Destructive Force

 
Prerequisite(s): Spellcaster level 1+
 
Benefit: You can raise the damage cap of capped spells by two dice (assuming you are of sufficient level to do so). A spell modified this way takes up a spell slot one level higher. Example: Fireball is normally capped at 10d6, but could be raised to 12d16 by a 12th-level caster with this feat.
 
Source: Net Book of Feats