If you equip non-twin-blades, the Oath state will be cleared.
You will be in the Yellow Super Armor while you are using the skill.
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.