Benefit
You get a +2 bonus on caster level checks (1d20 + caster level) made to overcome a creature’s spell resistance.
System Reference Document v3.5 © 2000–2003, Wizards of the Coast, Inc.; Authors Jonathan Tweet, Monte Cook, Skip Williams, Rich Baker, Andy Collins, David Noonan, Rich Redman, Bruce R. Cordell, John D. Rateliff, Thomas Reid, James Wyatt, based on original material by E. Gary Gygax and Dave Arneson.