You, and yours were enslaved to construct large, strange buildings for your masters. You and yours were lucky to be freed once your cyclopian building was constructed, to inspire other slaves that likely will not even survive that long. Even today you still have disturbing dreams of the building you helped construct.
Effect: You gain a +2 trait bonus on Knowledge (engineering) checks, and that skill is always a class skill for you. In addition, you gain a +2 trait bonus on Perception checks to find concealed or secret doors and traps in structures.