Consume Mana is an ability gained by Dark Knights in Final Fantasy XI once the player reaches level 55. The ability can be used once every minute. When used, the Dark Knight will begin preparing to use his MP to increase the damage for his next attack. Upon landing a successful attack on a target, all of the Dark Knight's current MP will be converted into extra damage. No MP is consumed unless the attack actually hits the target. This effect will last until a successful attack has struck a target, or until a minute elapses, whichever occurs first.