Diabolos Diabolos , also known as Diablos , is a recurring creature in the " Final Fantasy " series that has most often appeared as a summoned monster . He first appeared in " Final Fantasy VIII " and his trademark ability is Dark Messenger , which usually deals fractional damage based on the target ' s HP . Even though his nature and backstory change , Diabolos ' s appearance throughout the series is consistent . Appearances . " Final Fantasy VI " . Diabolos appears in the Game Boy Advance and subsequent versions . His magicite is obtained by defeating the Kaiser Dragon in the Dragons ' Den . Dark Messenger deals non - elemental fractional damage reducing opponents ' HP to 1 / 16 , ignoring protection to Death , and also inflicts Sap . He costs 100 MP to summon . Diabolos teaches Graviga ( x5 ) , Gravija ( x3 ) . At level up , Diabolos provides a + 100 % boost to HP . " Final Fantasy VIII " . Diablos is an optional boss who becomes a Guardian Force upon defeat . He can be obtained when the party receives the Magical Lamp from Headmaster Cid . Upon using the lamp in the menu the screen will dissolve and the player will fight Diablos . Diablos learns HP - J , Mag - J and Hit - J junctions , HP and Magic boosting support abilities , and Mug , which lets one steal items from opponents with the Attack command . Its unique abilities are ones that reduce the frequency of random encounter s and refine abilities that let the player make time magic and status magic from items . Because Diablos ' s attack power is determined differently from most GFs ' , it doesn ' t learn SumMag + abilities or Boost . Diablos ' s summon attack is Dark Messenger that deals damage in relation to the enemies ' maximum HP count via a percentage equal to Diablos ' s level range ( with a damage cap of 9 , 999 ) . Its compatibility item is Steel Orb and it also gains compatibility when the person junctioning it uses Demi and forbidden magic . Diablos doesn ' t have an " opposite " GF whose summoning would deplete its compatibility the most . Its Triple Triad card is dropped by its boss form . " Final Fantasy XI " . Diabolos is one of the five terrestrial Avatars , alongside Carbuncle , Fenrir , Phoenix , and Bahamut . He is the ruler and creator of the dreamworld known as Dynamis , and appears as a character and boss in the " " storyline . Players who have defeated Diabolos can optionally face a far more powerful version of him in the quest " Waking Dreams " to forge a pact with Diabolos , gaining the ability to summon him . As a summon associated with dreams and sleep , many of Diabolos ' s moves are magic - based and some gain bonuses from being used when it is nighttime or when the enemy is asleep . Diabolos also names a server in this game . " Final Fantasy XII " . Diabolos is a Mark and an otherworldly demonic gargoyle with a spear and fiery wings . It is fought at the Lhusu Mines . " " . Diabolos appears as a rank 2 Non - Elemental Flying summon . His regular attack is called Nightmare , while his special attack , Gravity , causes the Sap status . " Final Fantasy XIII " . Concept art for a Diabolos fal ' Cie exists , but it never appears in the game . Many different forms and styles were considered from an organic - looking creature to a mechanical one . " Final Fantasy XIV " . Diabolos appears as the final boss in the level 50 dungeon , Lost City of Amdapor . He uses both gravity magic and the skills of the " Final Fantasy XI " incarnation . To evade his Ruinous Omen attack , the party must memorize and open the correct door to the void which will protect the party while traveling through it . Though defeated , Diabolos managed to escape the lost city . He later appears in " Heavensward " as the one responsible for awakening the voidsent trapped in the Void Ark , and carried off the coffin containing the Shadow Queen Scathach into a voidgate . " Final Fantasy Type - 0 " . Diabolos is a Vermilion Bird Eidolon obtained by completing the Chapter 7 Expert Trial " Operation Dragon Slayer " . His attacks are drain - based as his movement involves him dispersing into a cloud of bats and striking anything that he passes through while healing him . One of Diabolos ' s attacks is a combo ending with him dispersing into a mass of bats which regenerate his health upon hitting Dark Strike . His signature technique is Gravitation Ball ( Graviton in his Astaroth variation ) where Diabolos drains the health of anything within the area into a large sphere which , upon release , drifts towards its target and explodes on contact . He comes in three variations ; Diabolos , Baalberith and Astaroth . " Bravely Default " . Diabolos is a demonkind enemy that appears in the Dark Aurora . " Final Fantasy Dimensions " . Diabolos is gained during Chapter 4 : The Darkness section , when the Warriors of Darkness traverse the Lufenian Ruins where they find a dark orb floating in the Demon Corridor . After touching the orb , Diabolos engages the party in battle . Upon defeat , Diabolos allows the Warriors of Darkness to summon him , costing 64 MP to summon . Diabolos ' s attack Dark Messenger hits all enemies and deals Darkness - element damage . Diabolos and the Monk ability Vacuum Wave are the necessary components to unlock the Dark Judgement Fusion Ability . Dark Judgement removes 1 / 4 of all enemies ' HP , reducing them to 3 / 4 of their current HP . " Final Fantasy Trading Card Game " . Diabolos is represented by a card of the aqua element portraying his appearance in " Final Fantasy Type - 0 " . Another card depicts Diabolos from " Final Fantasy XI " with a dark - elemental card , and a wind - elemental card for " Final Fantasy XII : Revenant Wings " . " Triple Triad " . Diabolos from " Final Fantasy Brave Exvius " appears on Triple Triad cards in the version available via " Final Fantasy Portal App " . Non - " Final Fantasy " guest appearances . " Crystal Conquest " . Diabolos is one of three summons in this Japan - only , free - to - play browser game . Its ability deals massive damage to other characters . " " . As part of a Collaboration between Capcom and Square Enix , Tetsuya Nomura was asked to design various new Armor types for the playable characters , and their feline companions . For Male Hunters Nomura created the set , which is based off of Diabolos . Etymology . Diablos emerging from a magic lamp in " Final Fantasy VIII " may be a reference to the djinn . The French localization of " Final Fantasy VIII " renamed Diabolos to " Nosferatu " , a Romanian term meaning " Unclean One " that is sometimes synonymous with the Devil or vampires . In the Spanish localization it is called Diablo .