Dodge

You follow your enemy's every move, watching for his attack.

Prerequisites: Dexterity 13

Benefit: As a free action, or as a reaction when you are targeted by an attack, you can focus on a creature. You gain a +1 dodge bonus to AC against that creature.

You can only focus on one creature at a time, and you lose your focus if you lose sight of the creature.

You can also use one more reaction each round. You can never have more reactions than your Dex bonus + 1.