Level 1
The lower HP enemies have, the more damage they will get. You will get Yellow Armor status when using the attack.
Disclaimer: Damage bonuses are currently calculated with 1000 melee, internal and ranged power, maxed weapon manual, 200 doll damage bonus, and 10 skill damage bonus per hit from treasure. In a future release of the website, you will have control over these parameters, and more, such as damage bonuses and weapon damage.