Aberration Banemagic

 
Prerequisite(s): Spellcaster
 
Benefit: When you cast a spell that damages an aberration, it does an additional 2d6 points of damage. Spells that create multiple projectiles only gain this bonus on the first projectile. Scrolls scribed or read by you do not gain this bonus, neither do any other magic items you create. Staffs however, use your caster level as well as gain the bonus when activated by you. If the spell allows a saving throw, the DC of the spell is increased by 2. If the aberration makes its save, the bonus damage is affected in the same manner os the normal damage (halved or negated).
 
Source: Lords of Madness, Player's Guide to Eberron