Trap Engineer( Dungeonscape, p. 46)
You have spent a great deal of time studying trap construction and recognize the work of famous builders, which gives you an edge against their devices.
You know the styles of famous dungeon architects or recognize their influences. After finding or setting off a trap in a dungeon, you gain a +2 bonus on future Search checks and Disable Device checks to find or disarm traps in that same dungeon. You also gain a +4 bonus on Reflex saves to avoid traps in that dungeon, and a +4 dodge bonus to Armor Class against attacks made by traps in that dungeon.