Your senses are so well honed that you are able to react to events slightly sooner than others, making it very difficult to catch you with your guard down.
Prerequisites: Alertness.
Benefit: At the beginning of combat, you are not considered flat-footed against enemies in your line of sight during the round before you rolled Initiative. You must have rolled Initiative in the round. Therefore, monsters that act before you roll for Initiative catch you flat-footed. You are not flat-footed against enemies that you can detect. An undetected enemy who attacks you catces you flat-footed, even if you have already rolled for Initiative.