You have studied advanced techniques for battling foes whose attacks normally bypass armor. You use your shield to block or deflect rays and other touch attacks.
Prerequisite: Shield Proficiency.
Benefit: You gain your shield bonus (and the shield’s enhancement bonus, if any) as an addition to your touch AC.
Special: A fighter can select Parrying Shield as one of his fighter bonus feats.
Source: Lords of Madness, page 181.