You are skilled at defending yourself while dual-wielding.

Prerequisites: None

Benefit: You gain two-weapon finesse and proficiency with weapons from the light and heavy blade group that are one-handed. When fighting with two swords (no a dagger is not a sword, neither is a swordfish) you may designate one enemy, your armor class is heightened by 4 versus that one enemy.

When you are not using two swords, you can still use this ability, but you only gain +2 AC versus that one enemy.