Dark Knight ( Final Fantasy XI ) / Abilities The Dark Knight is one of the advanced job classes in " Final Fantasy XI " . This is a list of job abilities and traits of the class . Job Traits . Attack Bonus . As the name suggests , Attack Bonus permanently increases the Dark Knight ' s Attack . There are multiple levels available : Resist Paralyze . This set of abilities allow to gain resistance to the status Paralyze . There are multiple levels available : Arcana Killer . This ability , available at level 25 , increases damage dealt to the Arcana monster family . Desperate Blows . Desperate Blows is a merit trait . It reduces the delay on two - handed weapons while Last Resort is active . Muted Soul . Muted Soul is a Merit trait . It reduces the enmity caused when Soul Eater is used . Job Abilities . Blood Weapon . Blood Weapon is the Dark Knight special job ability . As with all special job abilities , it is usable from level 1 up . The ability , when activated , will give the Dark Knight a 30 second special ability status effect . While in affect , every successful landed hit by the Dark Knight will drain a significant additional amount of HP . Blood Weapon has no effect on accuracy so it is possible that a Dark Knight could miss every single attack they have during that 30 seconds and gain nothing from using the ability . Also , like all HP and MP siphoning abilities , this has no effect when used against undead . Arcane Circle . Arcane Circle is an ability available at Level 5 . The ability will grant all nearby allies protection versus arcane type creatures for a period of 30 seconds . It is usable once every 10 minutes . Arcana include Bombs , Golems , Magic Pots , Jars , Evil Weapons , and mimics . Elementals are sometimes argued to be in this classification , but that is disputed . Last Resort . Last Resort is an ability available at level 15 and is usable once every 5 minutes . Last Resort is very similar in its affect to Berserk , the Warrior ability . The ability will increase a Dark Knight ' s Attack characteristic by 15 % while it will drop their Defense characteristic by 15 % as well . Also , unlike Berserk , it creates a very considerable amount of enmity , so it is likely to draw the attention of any creatures the party might be fighting , so it is quite likely that the Dark Knight will take a lot of additional damage after using this ability . Unlike Berserk , this status only lasts for 30 seconds . Generally , this means that Last Resort is only used by Dark Knights just before using a Weapon skill . Weapon Bash . Weapon Bash is an ability gained once the player reaches level 15 . The ability can be used once every 5 minutes . When used , the Dark Knight will use their weapon to strike the enemy . It does a small amount of damage ; however , its true application is its ability to Stun a creature and interrupt spell casters . It is relatively unreliable for stopping creatures ' special abilities . This ability does create a large amount of enmity , similar to the Fighter skill Provoke . Soul Eater . Soul Eater is an ability available at level 30 . The ability can be used once every 6 minutes and lasts for a period of 1 minute or until the player removes the effect manually . While active , each hit inflicted by the Dark Knight will decrease the Dark Knight ' s HP by 10 % . This loss of HP is converted directly into damage against another creature . Soul Eater also has a moderate effect on the Dark Knight ' s accuracy . If used with a support or Support Job , the player will still lose 10 % of their life per hit , but will only transfer about 5 % of that into damage to the enemy . Although Soul Eater is not affected by Defense or Vitality , it is affected by resistance to physical attack . Creatures weak to physical damage will take more damage than 10 % of the Dark Knight ' s HP , while creatures with high resistance to physical damage , such as Flan , will take less , with flan taking about half the normal amount . Ability - enhancing Equipment . " All three items are assumed to increase the percentage of converted HP to damage to 12 % rather than 10 % . " Dark Seal . Dark Seal is a merit ability . It boosts the Accuracy of the next Dark magic spell they cast . Diabolic Eye . Diabolic Eye is a Merit Ability . It is an ability that grants the Dark Knight an increase in accuracy at the expense of HP . Nether Void . Nether Void increases the absorption of the next dark magic spell by about 50 % .