Diabolos


 * See Diablos' summon sequences here.

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.

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. Should the player lose, the game ends in a Game Over. Diablos will become stronger as the party does; thus, it is advisable to defeat him just after receiving the lamp. Obtaining Diablos in the Steam version earns the player the achievement Diablos.

Diablos's summon attack is called Dark Messenger and it deals damage in relation to the enemies' maximum HP count via a percentage equal to Diablos's level range {e.g. 10-19, 30-39} (with a set damage limit at 9,999).


 * $$Damage = TargetMaxHP * Level / 100$$

Diablos can kill the opponent in contrast with other gravity-based attacks, meaning, at level 100, he will kill any foe with less than 9,999 Max HP. If Diablos is below level 10, his attack will deal 9% of enemies' maximum health in damage. Diablos won't work on most bosses, as most are immune to gravity. Because Diablos's damage is calculated differently from all other Guardian Forces he cannot be boosted, and though he can learn SumMag+% abilities via items, they have no effect on his attack power.

Stats
The following table represents the base stats:

Abilities
Abilities learned naturally by Diablos are listed below:

Diablos's ST Mag-RF skill is an integral part of the more casual of low level Challenges, as it is the earliest possible source of the Break magic that allows GFs to gain AP while keeping characters low level.

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 Chains of Promathia 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.

Final Fantasy XII: Revenant Wings


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.

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.

Trivia

 * The recurring summon from Ivalice, Adrammelech, resembles Diabolos, even having a with a similar pose to Diabolos's Final Fantasy VIII appearance.
 * Some concept art of Diabolos (Top right; central second row; central bottom) in Final Fantasy XIII look like the design has been subsequently modified to create the creatures Faeryl and Aeronite in the sequels.
 * In World of Final Fantasy, Diabolos's English voice actor is Robin Atkin Downes, who also voiced Genesis Rhapsodos in Dirge of Cerberus -Final Fantasy VII-.