"For 5 minutes, causes the servitor to be possessed with the spirit of an ancient assassin. Increases Accuracy by 4, Evasion by 4, Atk. Spd. by 20%, Critical Rate occurring in the rear by 20%, Critical Damage occurring in the rear by 20%, and resistance to de-buff attacks by 10. Allows servitor to recover 5% of standard melee damage inflicted on an enemy as HP. Consumes 10 Spirit Ore."