Open the umbrella and ride the wind upward. While holding down the skill key, levitate and move in the air. When the key is released, swiftly slash down with a sword, empowered by lightning, over a distance of 8 meters to inflict 13253 Damage and knock back foes. If the key is released before fully riding the wind upward, you'll strike down quickly over a 4 meter distance to inflict 6640 Damage.