Epic Spell Penetration( Epic Level Handbook, p. 54)
Your spells are tremendously potent, breaking through spell resistance with ease.
Spell Penetration (PH) , Greater Spell Penetration*,
You get a +6 bonus on caster level checks to beat a creature's spell resistance. This overlaps (does not Stack with) the bonuses from Spell Penetration and Greater Spell Penetration. *This feat is presented in the Nonepic Feats section at the end of this chapter.