The feat grants the user the ability to make two instant attacks against a target. The success of each attack is calculated using the user base attack bonus plus any additonal enchantment bonuses on the attacker primary weapon. Damage is determined as maximum base damage for the weapon type plus a bonus of any enchantment. These attacks do have a chance to critical and can do so at a significantly higher rate than a standard attack. The critical damage is determined randomly but can be as much as two times the normal weapon damage plus the maximum amount of any Massive Critical Item Property. This attack can be used every 180 seconds.