Encounter: Doom Drone (Traumatizer), a low-level construct warrior in thrall to a higher master; nonetheless, its weird torso cannon has lasting effects when it manages to land a hit:

First hit: that creature develops a pathological fear of Constructs, always taking disadvantage against them

Second hit: the creature must make a Will Save to attack or fight back against Constructs at all

Third hit: the creature becomes Frightened on sight of any Construct