Pearl of Black Doubt

3rd-level / Diamond Mind

You prey on your opponents’ fear and lack of confidence. Each failed attack against you reminds them that their skill cannot hope to match yours. When you enter this stance, you become more difficult to hit with each successive attack that misses you. Each time an opponent misses you with a melee attack, you gain a +2 bonus to your AC. This bonus lasts until the start of your next turn and is cumulative for the round. If an attack hits you, you loose all the accumulated bonus so far.