Lightning Empress Armor

Lightning Empress Armor is an armor that lowers the attack damage of all thunder attacks aimed at the wearer. Laxus Dreyar stated that it wasn't enough to stand his Lightning Magic; however, the single attack aimed at Erza in the anime did no damage to her. In the anime, Erza also states it is not just for defense, as she can now fire blue lightning attacks towards her foes using the equipped staff.