Osmose ( ability ) Osmose , sometimes translated as Psych , Asper , Aspir , or Syphon , is a recurring spell from the series . It is normally associated with Black Magic . The spell absorbs MP from opponents . Many bosses and magic - using enemies will cast Osmose ( or something similar ) on a player character if they are getting low on MP . It works in reverse or not at all against undead . It has an upgrade in the form of Osmoga . Appearances . " Final Fantasy II " . Osmose is a Black Magic spell which transfers MP from one or all enemies to the caster . This is reversed when casting on the undead . The amount of MP transferred depends on the spell level . At a high spell level , Osmose can be incredibly powerful . Any character can learn Osmose by having them use the Osmose Tome ( called the Osmose Scroll in the " Origins " release ) . Osmose VIII is exclusive to the Wizard , while Osmose XVI can be cast by Hecteyes and Mega Parasite . " Final Fantasy IV " . Rydia , Palom , Tellah , and Fusoya can cast Osmose ( also known as Psych ) . It has a casting time of 5 and costs 0 MP . Osmose often only absorbs 1 MP the enemy , as that is the amount of MP most enemies have . A few enemies , like Red Dragon , allow the caster to gain 100 - 150 MP . It can also be cast via using the Lilith Rod as an item in battle . In the 3D releases , Osmose is much more effective and can drain up to 99 MP from enemies , although some enemies are still immune . It also costs 5 MP to cast instead of 0 . In all releases , a good idea is to use Osmose on Cecil and Edge , as they are primarily physical attackers whose magical abilities are negligible , and they thus have little use for MP . The spell has a spell power of 16 in 2D versions , and 10 in 3D versions , and an accuracy of 100 % . Osmose can be cast by Zeromus EG , Golbez , Tiny Mage , and Dark Sage . Zeromus can also cast the spell in the DS version . On the " Easy Type " version , the casting time was reduce to 1 and increase the base power to 20 . " Final Fantasy IV - Interlude - " . Osmose returns as a Black Magic spell in the sequel of " Final Fantasy IV " . The imposter Rydia along with Rydia already known the spell , but Palom learns it at level 40 . It absorbs MP from one target and restore own MP at the cost of 0 MP . Osmose retains all of its features from " Final Fantasy IV " , and is learnable by Palom at level 25 , Rydia at level 26 , Golbez at level 32 and Leonora at level 39 . Fusoya starts with the spell . " Final Fantasy V " . Osmose is a Level 6 Black Magic and Spellblade spell . It is known as Aspil in the SNES version and PlayStation remake . It can be bought in Phantom Village for 10 , 000 gil , and costs 1 MP to cast . It is one of the spells that can be cast from the Wonder Wand for free , and is an Added Ability to the Lilith Rod . Osmose can be cast by Aspis , Enuo , Farfarello , Mini Magician , Ramuh , and Soul Eater . The player may utilize this ability by catching and releasing a Farfarello . " Final Fantasy VI " . Osmose is an Effect spell that can be learned from Zona Seeker at a x15 rate and Shiva at a x4 rate . It is one of the most potent forms of the Osmose in the series : Osmose absorbs enough MP from the target to replenish the caster ' s own MP to full , provided the target has enough MP to do so . There ' s also a bunch of enemies that can be killed by bringing their MP down to 0 . It costs 1 MP to cast , has a hit rate of 150 , a power of 26 , and is vulnerable to Runic . Osmose can be cast by Level 30 Magic , Level 60 Magic , Wizard , and Zurvan . Also , Osmose cannot be reflected . " Final Fantasy VII " . The enemy ability Aspil is a magical attack that reduces the MP of the target and adds the same amount of MP onto the original caster ' s , for the price of 1 MP . It is used by the bosses Gi Nattak and Lost Number , by Killbin in Whirlwind Maze , and by Christopher in Northern Cave . Although not available through a spell , characters can absorb MP from targets through the Ghost Hand item . It absorbs a number of MP from a single target , and adds the MP onto the original caster . When the item is used on an undead enemy it has the reverse effect and the user will lose MP while the target will gain . The MP Absorb Support Materia can be used to absorb MP from targets . When an ability on the Materia the MP Absorb Materia is paired with is used , the caster will get 1 % of the HP amount inflicted on the enemy back as MP . The Magic Hammer appears as an enemy ability and an enemy skill also will leech up to 100 MP from an enemy for an MP cost of 3 . " Crisis Core - Final Fantasy VII - " . Osmose absorbs a small amount of MP from an enemy . It requires no MP to cast , and is a rank 3 Magic Materia . It can be bought from the Sector 8 Materia Shop for 4 , 000 gil , stolen from G Blader and G Slayer , or found during mission 8 - 4 - 3 . " Final Fantasy IX " . Vivi can cast Osmose Black Magic spell , learned through the High Mage Staff and Gaia Gear . It costs 2 MP to cast , 70 AP to learn , and has a spell power of 15 . It can ' t be reflected and works with Return Magic . Both incarnations of Tiamat and Ozma can use the ability Absorb MP which decreases its target ' s MP amount and adds it to its caster . The amount of MP that Osmose drains is as follows : " Final Fantasy X " . Osmose is a Black Magic spell found in Wakka ' s section of the Sphere Grid . It costs 0 MP to cast . Osmose can be cast by Dark Element , Dark Flan , Yu ' s Left Pagoda , Vidatu , Yu ' s Right Pagoda , Yunalesca ( last form ) , and Yu Yevon . Drying out the enemies ' MP iis ineffective to prevent them from casting magic spells because they all possess the auto - ability No MP Cost innately . Their MP pool only functions as dictating how much MP player characters can drain . The damage from Osmose is considered neither physical or magical , instead falling into " special " damage category . This means it will be unaffected by Protect or Shell . " Final Fantasy X - 2 " . MP Absorb is an ability learned by the Black Mage dressphere . Osmose is an Arcana spell cast by equipping the White Tome or the Black Tome , which also decrease cast time of White Magic and Black Magic respectively by 40 % , or by equipping the Covetous Garment Grid , and changing dresspheres so as to pass through its red gate . Various enemies are capable of casting this spell . " Final Fantasy XI " . Aspir is a Dark Magic spell that absorbs an enemy ' s MP . The potency of the spell depends primarily on a character ' s Dark Magic skill . Like all absorption spells , Aspir is ineffective on undead . Additionally , a large number of monsters have 0 MP , thus rendering the spell ineffective . The Aspir scroll can be obtained in the quest Making the Grade in Windurst , or purchased from the player - stocked auction house . " Final Fantasy XII " . Syphon ( Aspir in the Japanese version ) is an Arcane Magick spell that drains MP from enemies and transfers it to the caster . The license for Syphon is Arcane Magick 4 that costs 50 LP and costs 2 MP to cast . The spell can be bought inside the Skyferries for 4 , 000 gil . The spell can be bought after defeating Judge Bergan at Mt Bur - Omisace . In the " International Zodiac Job System " version , Syphon is listed as Green Magick , its license being Green Magick 3 along with Bubble . It can be used by all four mage job classes : White Mage , Black Mage , Time Battlemage , and Red Battlemage . The formula for MP absorb is as follows : As demonstrated above , Syphon ignores the target ' s Magick Defense . " Final Fantasy Tactics " . Osmose is an ability of the Templar class , learned for 100 JP . It drains MP from one target with a range of 4 for 2 MP . Syphon is a spell learned by the Arcanist for 300 AP from the , costing 12 MP to cast and has a range of 4 . An upgraded version , called Syphonja , is used by Neukhia , which fully depletes all enemy units ' MP . " Bravely Default " . Aspir is a level 4 Black Magic spell . The caster absorbs MP from one target . If used on an undead target , both the user and target will take MP damage . Aspir is also a level 4 Sword Magic spell . It adds MP Absorb to weapon for 10 turns . It costs 1 MP . " Final Fantasy Trading Card Game " . can use her Aspir Venom from " Type - 0 " . For discarding a Rem card and paying one Wind CP , Aspir Venom deals 2000 damage to all the opponent ' s Forwards , and the player ' s Forwards gain 2000 power until the end of the turn . Etymology . The original name , " Asupiru " ( or " Aspir " ) , is likely an abbreviation of the word " aspirate , " meaning " to draw in by suction , " or the French version of that word , " aspirer , " with the same meaning .