Greater Spell Penetration
From Compendium of Worldly Lore
Needs review
Source: Player's Handbook
Description: Your spells are remarkably potent, breaking through spell resistance more readily than normal.
Prerequisites: Spell Penetration
Required for: Epic Spell Penetration
You get a +2 bonus on caster level checks (1d20 + caster level) made to overcome a creature's spell resistance. This bonus stacks with the one from Spell Penetration.