Cautious Attack( Drow of the Underdark, p. 47)
When you take your time in combat, you quickly assess the flow of battle to respond rapidly to threats.
Dodge (PH) , WIS 13,
Whenever you ready a standard action to attack, you gain a +1 dodge bonus to AC. This bonus lasts until you take the readied action, or until the start of your next turn, whichever comes first.