Spellvexing

Spellvexing (Ex): Utilizing disruptive gestures, sounds, and other antics, you can thwart the efforts of spellcasters. As a swift or immediate action, you can grant yourself spell resistance equal to 6 + your vexer level. This ability can be used for a number of rounds equal to your vexer level. These rounds need not be consecutive. This ability only works if you have at least one free hand, can speak, and are aware of any spell or spell effect targeted at you.