Dungeoneer's Intuition
(City of Splendors: Waterdeep, page 144, DnD 3.5)
[General]
You can sense when things don't feel right, and you have a knack for avoiding deadly traps and sudden ambushes.
Prerequisite
Wisdom 13, trap sense class feature
Benefit
You add your Wisdom bonus to your trap sense bonus. In addition, you can apply your trap sense bonus to your AC during a surprise round (although you still might be fl atfooted if you were not aware of your foes before they struck).