Pierce Magical Protection

(Complete Arcane, page 82, DnD 3.5)

[General]

You can overcome the magical protections of your enemies.

Prerequisite

Mage Slayer, CON 13

Benefit

Your contempt for magic is so fierce that as a standard action you can make a melee attack that ignores any bonuses to Armor Class granted by spells (including spell trigger or spell completion effects created by magic items such as wands or potions). If you deal damage to your opponent, you also instantly and automatically dispel all that opponent's spells and spell effects that grant a bonus to Armor Class.

Special

Taking this feat reduces your caster level for all your spells and spell-like abilities by 4.