Gravity ( ability ) Gravity , also known as Demi , is a recurring fractional damage spell from the " Final Fantasy " series . In a few games it appears in , it ' s a Gravity - elemental spell . It cuts an enemy ' s HP by a specific amount , usually by 50 % or 25 % , although this depends on the game . The number of targets it affects is also game dependent . In most cases , the spells in the Gravity family are not lethal and round half down to the damage value . If the target ' s remaining HP is 1 , the resultant damage will be zero . But the damage value of Gravity and Graviga of " Final Fantasy IX " , " Final Fantasy XII " and " Final Fantasy Tactics " are based on the target ' s maximum HP as opposed to remaining HP in other installments , making them actually lethal . The upgrades of Gravity are called Graviga , also known as Quarter or Demi 2 , and Gravija . The " Compilation of Final Fantasy VII " and the " Final Fantasy Crystal Chronicles " series are by now the only games that include the - " ra " tier spell , Gravira , of the Gravity family . Appearances . " Final Fantasy V " . Time Mages can cast Gravity , also known as Demi , as a Level 3 Time Magic spell . It can be bought from Karnak for 620 gil , requires 9 MP to cast , and is non - elemental . Enemies with the hidden " heavy " property are immune . The enemies Chrono Controller , Exdeath in the first fight , Hole , Omniscient , and Atomos can use the spell against the party . " Final Fantasy VI " . Gravity , also known as Demi in the SNES version , is an Attack spell taught by Phantom . Gravity reduces the target ' s HP by 1 / 2 , costs 33 MP to cast , has a hit rate of 120 , but will fail against those immune to Death . It is vulnerable to Runic . Daedalus , Level 20 Magic , Necromancer , Angel Whisper , Zone Eater , and Zurvan are capable of casting this spell . " Final Fantasy VII " . Demi is the first spell available through the Gravity Magic Materia . It costs 14 MP to cast . Barret can use this spell in the 1996 demo release for the cost of only 5 MP , but its effect is the same as the effect of Demi2 in the final game . Deenglow is the only enemy in the game to use the spell against the player . Gravity spells deal Gravity - elemental damage , which some monsters can resist or absorb . " Before Crisis - Final Fantasy VII - " . Gravity appears as a Materia . " Crisis Core - Final Fantasy VII - " . The Gravity Materia conjures an orb of darkness to fall on an opponent . It explodes on contact , dealing damage to all enemies in range equal to 25 % of their HP . Gravity costs 22 MP to cast . Unlike most other low level Materia , Gravity cannot be purchased at the shop , although a stronger version of it , Graviga , can be . It also can ' t be made through Materia Fusion . G Deleter s drop Gravity Materia . " Final Fantasy VIII " . Demi is a Gravity - based spell , which decreases a single opponents HP by 1 / 4 of its current HP and , unlike in other games in the series , is quite useful on many powerful enemies , such as the Tonberry . Casting Demi in battle increases compatibility with Diablos by 2 , and is one of the few spells that doesn ' t lower compatibility with any GF when cast . Since Angel Wing makes spells do five times the damage , Demi has the potential to defeat an enemy as it deals damage equal to 1 . 25 times the opponent ' s current HP , though capped at 9999 . " Final Fantasy IX " . Vivi can learn the Black Magic spell Demi . It costs 18 MP to cast and can be learned for 30 AP from the Cypress Pile , Black Belt , and Amethyst . Unlike most magic , Demi ' s damage is unaffected if one multi - targets the spell . It can be reflected and works with Return Magic . The formula for Demi is as follows : In the first encounter with Kuja , he casts Demi frequently . " Final Fantasy X " . Demi is a Black Magic spell found in Lulu ' s section of the Sphere Grid . Demi affects all units of the target party and inflicts damage equal to one quarter of their current HP , capped by the damage limit . The resultant damage is rounded down , meaning a character with three HP or below will take no damage from Demi . In Lulu ' s Fury Overdrive each casting of Demi inflicts damage equal to one eighth of all enemies ' current HP . The enemies Abaddon , Anima at the Remiem Temple , Black Element , Catastrophe , Dark Flan , Omega Weapon , Sinspawn Ammes , Sinspawn Gui , and Varuna can cast this spell . " Final Fantasy X - 2 " . Demi is part of the Arcana spellset of the Dark Knight dressphere , and requires 20 AP to master . It can also be used by equipping the Black Ring accessory or by passing through the red gate on the Downtrodder Garment Grid , or via Lady Luck ' s Magic Reels by rolling three Skulls . It costs 10 MP to cast and reduces the HP of the target party by 25 % . Several enemies are capable of casting the spell against the party , including Trema and Paragon ( Oversoul ) . Demi Sword is an ability used by the Warrior dressphere that requires Flametongue , Ice Brand , Thunder Blade , and Liquid Steel to be mastered . It takes 60 AP to master and costs 6 MP to use . It inflicts Gravity - elemental damage to one target . " Final Fantasy XI " . There is a spell in " Final Fantasy XI " known as Gravity ; however , it is completely different than the traditional Gravity spell : It is a Black Magic spell which can only be cast by Red Mages that decreases the target ' s physical movement speed by inflicting Weight , a status effect , and also decreases Evasion by 10 points . " Final Fantasy XII " . Gravity is included in the Arcane Magick 2 License on the License Board and costs 30 License Points . The spell can be bought in Rabanastre , Eruyt Village , and Mt Bur - Omisace for 2 , 800 gil . It causes damage equal to 25 % of the enemy ' s max HP and hits all targets in range . Unlike most offensive spells , Gravity spells have a chance to miss . Gravity ' s base success rate is 70 % , but it is also affected by the caster ' s Magick Power and the target ' s Vitality . Most , if not all , bosses are immune to gravity . In the " International Zodiac Job System " version , Gravity is a Time Magick 4 License and can only be used by the Time Battlemage . Gravity is used by the Yarhi , Diabolos . It deals damage equal to 25 % of the enemy ' s max HP . " Final Fantasy XIII - 2 " . Gravity is an ability which appears in the opening sequence of the game , during the Cinematic Action in which Lightning battles with Caius . It only appears once , alongside Ruinga , as an option . If chosen , Lightning uses the spell to attract surrounding debris towards Caius , trapping him inside . Afterwards , the ability is not seen for the rest of the game . " Final Fantasy XIV " . Gravity is an Astrologian ability unlocked at level 52 after completing the quest Empty Nest . It has a 3 second cast time and 2 . 5 second cooldown . It deals damage to multiple enemies , beginning with a potency of 200 and reducing the damage it deals by 10 % for each enemy it hits . " Final Fantasy Tactics " . Gravity , also known as Demi , is a spell learned by Time Mages for 250 JP . It costs 24 MP to cast with the charging speed of 17 . It reduce the targets in the area by 1 / 4 of their max HP . The damage fraction is the same as Mystic Art Invigoration with nearly instant casting speed of 50 and ignoring target ' s magickal evasion , but Gravity has higher hit - rate and can hit multiple targets . It is effective against many of the Lucavi bosses due in part to their having a couple thousand HP and having no resistance to Gravity . " Final Fantasy Tactics Advance " . Demi is a spell that reduces HP by 1 / 2 for 24 MP . Time Mages can learn Demi from the Stardust Rod for 300 AP , while Babus knows the spell as the Runeseeker . It is stealable through the ability Steal : Ability , and is also susceptible to Return Magic and Absorb MP . A Blue Magic spell , Twister , which is learned from Lilith , also has the same effect . " " . Gravity is now an Arcanist ability , reducing HP of an target by 1 / 4 at the cost of 12 MP . It is learned for 250 AP through the Force Rod and has a range of 3 . " Final Fantasy Crystal Chronicles " . Gravity is cast by fusing any two Element Magicite ( Fire + Blizzard , Blizzard + Thunder , or Fire + Thunder ) . It can take down flying enemies onto the ground . Gravity is cast by piling Fire , Blizzard , and Thunder . If cast on a player , they will not be able to jump for a short amount of time . It also deals moderate damage . Gravity is cast by stacking Blizzard and Raise target rings . It prevents the target from jumping . " Vagrant Story " . Gravity is an enemy ability used by Dao , Guildenstern , and Death . " Bravely Default " . Gravity is a level 3 Time Magic spell . It has a 50 % chance to deal damage to one target equal to 50 % of its maximum HP . It doesn ' t work on bosses . It costs 12 MP . " Dissidia Final Fantasy " . Cecil has a variation of Gravity called Gravity Ball as a Bravery attack . It fires an orb of dark energy that slowly arcs towards the ground , dragging opponents down . A variation of this , Paladin Arts , arcs upwards instead and allows Cecil to class - change to Paladin after attacking to chain Searchlight . Gravity Ball costs 20 CP to equip and 140 AP to master , while Paladin Arts costs 30 CP and 300 AP . Cecil knows Gravity Ball initially and learns Paladin Arts at Level 38 . Golbez has a Bravery attack called Gravity Force , in which he fires an orb of dark energy and teleports and fires a second orb to knock the opponent into the first . If the opponent is hit by the attack , they are flung downwards after taking damage . The attack costs 30 CP to equip and 120 AP to master . " Final Fantasy Record Keeper " . Gravity is a Black Magic Ability with a Rarity of ☆☆ . It reduces the target ' s HP by half , it can initially be used two times and it can be honed to Rank 5 . It can be created by using Black Orb x5 , 3 Lightning Orb x3 , Dark Orb x3 , and 5000 gil . Non - " Final Fantasy " guest appearances . " Kingdom Hearts " series . Gravity , along with its tiers Gravira and Graviga appears in ' and ' . When used , the spell creates an orb of darkness that slowly crushes the enemy and reduces the enemy ' s HP by a set fraction . , Zero Gravira and Zero Graviga are spells that appear in " " . When used , the spell flings the enemies into the air where they slowly lose HP and become vulnerable to Confuse when hit . Etymology . It is also called " Demi . " This is sometimes a misnomer as the spell of that name does not necessarily reduce a foe ' s remaining health by half . As noted , Gravity does percentage damage based on the target ' s HP , thus doing more damage to enemies with more HP . This is roughly analogous to the fact that the larger a mass is , the greater the gravitational force it exerts on objects around it .