Souleater Souleater , also known as Soul Eater , Darkness , Shadow Blade , Dark , Dark Wave , or Darkside , is an ability where a character sacrifices a small amount of HP to deliver a strong Dark - elemental attack , usually on all enemies . It is usually associated with the Dark Knight job . Appearances . " Final Fantasy III " . Souleater is a job command exclusive to the 3D version of the Dark Knight . It damages all enemies at the cost of 20 % of the user ' s max HP . This is part of the reason ( the other being their weaponry ) that Dark Knights are good against enemies that multiply . The damage formula for Souleater is as follows : " Final Fantasy IV " . Darkness , also known as Dark or Dark Wave , is used by Dark Knight Cecil . Darkness has a Charge Time of 2 . It deals non - elemental damage to all enemies by consuming his HP , but flan - type monsters are immune to it . If Cecil uses it too much he can KO himself when low on HP . This command was removed from the North American SNES version but during Cecil ' s encounter with his Dark Knight copy during his Paladin trial , the copy still uses this move . Unlike every other commands , Darkness is still present and usable in the " Easy Type " version . In the 3D remake of " Final Fantasy IV " , Darkness is a completely different ability that empowers physical attacks at the cost of the user ' s HP . The damage formula for Darkness in non - DS versions is as follows : If the target is undead : Known as Darkness , it is an used by the Dark Knight in the Final Tale , located in the Depths . " Crisis Core - Final Fantasy VII - " . Zack can use Darkness by equipping the Darkness Materia . By sacrificing 12 . 5 % of his HP , the player may damage all enemies within a radius around Zack , ignoring vitality . The ability costs no AP to use . The Darkness Materia is obtained as a reward for missions 4 - 4 - 2 and 8 - 4 - 6 , and is dropped by Demon and Horned Devil , and stolen from Land Malboro . " Final Fantasy VIII " . The Guardian Force s Diablos , Doomtrain , and Eden learn the Darkside command ability for 100 AP . It deals three times the damage of a normal attack , but the user will take damage equal to 1 / 10th of their max HP . " Final Fantasy IX " . Steiner has Darkside as a Sword Art . It deals Shadow - elemental damage 1 . 4 times as strong as a normal attack in exchange for 12 . 5 % of Steiner ' s max HP . Darkside will ignore Mini status if Steiner is afflicted , and also ignores the target ' s Protect status . It will inflict higher damage if Steiner is equipped with any equipment that increases Shadow damage . Darkside requires no MP to use and is the only Sword Art at zero MP cost , making it a viable option should Steiner use up his MP with Sword Magic and Sword Art attacks . It is learned with the Blood Sword , which absorbs HP from the enemy making the combination of said sword and Darkside viable early in the game and in Ipsen ' s Castle . The formula for Darkside is as follows : " Final Fantasy X - 2 " . Available to Dark Knights as a job command called Darkness , the command takes at least 300 HP from the user to damage all enemies . Darkness is a non - elemental attack . A glitch exists that if the user equips the Ragnarok accessory , or makes it so that spells cost 0 MP , Darkness will take no HP to use . " Final Fantasy XI " . The Dark Knight job class can use Soul Eater . It adds 10 % of the player ' s HP to their next physical attack , making multi - hit weapon skills and certain weapons very formidable when used with Souleater . " Final Fantasy XII " . The Souleater Technick is purchasable for 35 LP on the License Board . It deals damage to opponents by damaging the user . Souleater is 1 . 4 times more powerful than a regular physical attack . Because Souleater doesn ' t use the weapon ' s innate damage formula , but only considers the weapon ' s ATK stat , it is best to equip the highest - ATK weapon . Souleater heals the undead . Souleater can be bought in Rabanastre and Nalbina Fortress for 6 , 400 gil . In the " Zodiac job system " version , the Technick is available for the White Mage , Red Battlemage , Knight , Monk , Bushi , and Uhlan job classes , although the White Mage and Bushi must obtain the Esper Adrammelech , and Monk must obtain the Esper Exodus license first . In " Final Fantasy XII International Zodiac Job System " , Souleater is 1 . 7 times more powerful than a regular physical attack and heals undead enemies by 2 . 0 times . Souleater is learned by Ba ' Gamnan at level 24 and consumes 25 % of his HP . " Final Fantasy XIV " . Souleater is a level 38 Dark Knight weaponskill with a range of 3 yalms . It delivers an attack with a 100 potency normally , but combos with Syphon Strike to instead deal 260 potency damage . It can also combo with Dark Arts to deal 240 potency damage with a combo potency of 400 , and under Grit , absorbs 50 % of damage dealt as HP ( increased to 100 % with the Soul Devourer trait unlocked at 48 ) . Dark Arts will fade upon use . The Lanista class , exclusive to seeq , have Souleater as an ability . It consumes 10 % of the user ' s max HP to inflict Dark - elemental damage . However , unless the target is weak to the Dark element , it is usually deals the same amount of damage as a normal attack . " Final Fantasy Type - 0 " . Darkside is an attack usable by Machina Kunagiri . It deals damage to multiple targets , stunning them and draining HP . " Final Fantasy Crystal Chronicles " . Shadow Blade is the Focus attack of the sword Ragnarok . The user rushes towards the enemy delivering a powerful slash that releases a dark crimson burst of energy on impact , delivering heavy damage at the cost of half of one of the users Hearts . Shadow Blade is a level 20 Sword Skill , which caps at level 100 . It allows the user to deal additional damage at the cost of sacrificing HP , and can only be used once per day . Darkside is an ability in the Dark Fencer crown . The crown also learns enhanced variations of this skill . Dark Fencer ' s abilities can attack one or multiple enemies , but sacrifice HP in the process . " Bravely Default " . Dark Bane is a Dark Arts ability learned by Dark Knights at job level 1 . The character sacrifices 20 % of their maximum HP to unleash a dark physical attack on one target that deal 125 % the damage of a normal attack . " Final Fantasy Dimensions " . Darkness is the default ability of the Dark Knight class . At the cost of 1 MP and 1 / 4 of the user ' s Max HP , the user will inflict heavy non - elemental damage to one target . " Dissidia Final Fantasy " . Soul Eater is an HP attack available to Cecil and Bartz . When performed , Cecil or Bartz stabs forward with their sword , then slam an orb of dark energy into the opponent . Cecil ' s version of Soul Eater costs 40 CP to equip and 360 AP to master , while Bartz ' s Soul Eater costs 45 CP to equip and 180 AP to master . Cecil ' s Bravery attack Dark Cannon resembles the Dark Wave attack from " Final Fantasy IV " , and has Cecil charge and fire a swarm of dark energy orbs forward that swirl back towards him , dragging opponents closer . The attack costs 20 CP to equip and 180 AP to master . If the player fails to input Cecil ' s EX Burst perfectly , he ends the burst with Darkness , which has a similar appearance to Dark Wave . " Dissidia 012 Final Fantasy " . Soul Eater and Dark Cannon return as attacks for Cecil . However , Bartz can no longer use Soul Eater , instead gaining the Dark Flame ability from Cecil . " Theatrhythm Final Fantasy " . Dark comes in three levels of power , granting boosts to Strength but increasing the damage the party takes . Dark Lv1 increases Strength by 25 but increases taken damage by 10 % , Dark Lv2 increase these figures to + 45 Strength and 20 % damage , and Dark Lv3 grants + 75 Strength at a cost of 30 % more damage . Cecil learns the three levels of Dark at Levels 25 , 50 and 80 , and Sephiroth begins knowing Dark Lv1 at Level 1 , and learns Lv2 and then Lv3 at Level 25 and Level 55 . " Final Fantasy All the Bravest " . Souleater is the ability that is used by Dark Knight Cecil during battle . " Final Fantasy Brave Exvius " . Darkside is a special ability that allows the user to inflict dark physical damage ( 1 . 5x ) to all enemies while sacrificing 30 % HP instead of spending MP . While all units can access this skill by equipping Diabolos ( 2★ ) , who learns Darkside after spending 30 SP , the only units who naturally learn this skill are Duane ( at Level 38 , 5★ ) , Gaffgarion and Garland ( both at Level 60 , 4★ ) and Dark Knight Cecil ( at Level 10 , 5★ ) . Dark Knight Cecil also has access to Soul Eater , which he learns at Level 100 ( 6★ ) . Soul Eater costs 12 MP to cast and enables Cecil to deal dark physical damage ( 3 . 2x ) with HP sacrifice ( 49 % ) to a single target . " Final Fantasy Trading Card Game " . Various Dark Knight cards have effects based on Souleater , increasing their power depending on the player ' s damage , or enabling them to damage all enemies while also damaging themselves . A card featuring the gains + 1000 Power for each damage the player has taken , while a card featuring the allows the player to choose one of their Forward when it is played , and it receives + 1000 Power for each damage the player has taken , until the end of the turn . A card featuring artwork inflicts 1000 damage to Cecil and to all the opponent ' s Forwards when he attacks . A card depicting artwork allows the player to deal 1000 damage to all the opponent ' s Forwards and 2000 damage to the Dark Knight for a cost of one Lightning CP . Other appearances . " Kingdom Hearts " . The is signature weapon . It is a black and red sword shaped like a demonic wing with a bright blue eye near the base of the blade . Similar to Cecil , Riku is consumed in darkness in the first game of the series , but comes to gain control over the darkness and wields it to his advantage to fight for the forces of light in subsequent games . The Soul Eater can also shift form into Riku ' s Keyblade , the , which retains the base appearance of the Soul Eater with the addition of an angelic white wing at the tip for the Keyblade ' s teeth and two other wings wrapped around the handle as a guard , symbolizing his dual nature . A version of the technique itself also appears in ' and ' , where it is called " " .