Baneful Bunker

You sense incoming danger and are able to quickly create a barrier to avoid it.  When targeted by an attack, you may automatically avoid taking damage on the first instance of this reaction. If Baneful Bunker was successful in avoiding a melee attack, the attacker becomes poisoned.  On future instances of this move in the same combat, you must roll higher than a 15 on a d20 roll for the reaction to be successful.