Focus ( ability ) Focus , also known as Accumulate , Store , BuildUp , Power , Boost is a recurring ability in the " Final Fantasy " series . Unlike many abilities , Focus has had no set function , but follows the general formula of increasing a certain stat of the user . Appearances . " Final Fantasy III " . Boost ( BuildUp in the NES version ) is the command ability of the Black Belt class , which doubles the next attack ' s power . It can be used three consecutive times , before the user releases its boosted energy and takes damage . " Final Fantasy IV " . This ability was removed on the SNES North American and " Easy Type " versions . Focus was known as Power in the PS translation . In the GBA release Yang has the Focus ability . Focus has a Charge Time of 4 . When used , Yang spends a short time charging up , and then makes an attack with double his regular attack power , though Yang is unable to avoid any magic attacks . This makes Focus particularly effective against monsters with high Defense , and can even get past the immense Defense stats of Flan type monsters if Yang is wielding claws which match their elemental weaknesses . In the GBA / PSP releases , Yang can upgrade the Focus attack to Deadly by equipping the Discipline Armband ; Deadly has the same properties , but triples his attack power . The duration of both abilities are determined by Yang ' s Agility . In the 3D releases , Yang still has the Focus ability , and it can be obtained as an augment after he leaves the party . Instead of executing automatically , it can be used up to three times in succession , each time powering up the next physical attack further . Focus affects the Attack , Jump , Kick , Aim , and Throw commands , and stacks with Darkness . " Final Fantasy IV - Interlude - " . Focus returns as Yang ' s exclusive ability . It functions the same way as it did in the predecessor . Yang ' s Focus works as it does in the GBA / PSP releases of " Final Fantasy IV " . It has a Charge Time of 4 . " Final Fantasy V " . Monks can use Focus to double their Attack power after a turn . Focus will ignore any added abilities from weapons ( randomly cast spells or a weapon ' s special ability ) , excluding Spellblade effects currently on the character . Any weapon that works on magic , such as rods and the Blood Sword , will not get a damage boost from Focus . " Crisis Core - Final Fantasy VII - " . Boost is an enemy ability used by G Intruder , which grants Endure and Critical to the user for 60 seconds at the cost of 6 MP . " Final Fantasy IX " . The Focus command increases Vivi ' s Magic Power . Vivi can stack the effect , but once the Magic stat reaches 99 , it will not increase further . The effect lasts for the entire battle , even if KO ' d . The formula for Focus is as follows : " Final Fantasy X " . Boost is a command available to the aeons if the player presses right on the command menu . It allows the aeon ' s Overdrive gauge to fill up faster ( 1 . 5x rate ) at the cost of the aeon taking more damage ( 3 / 2 of normal damage ) . It is the opposite of Shield . " Final Fantasy XI " . Focus is an ability available to Monks . It increases their Accuracy . Focus is an ability learned by Rikken and enemy Monks that increases the damage of the user ' s next attack . " Final Fantasy Tactics " . Focus ( originally known as Accumulate ) is an ability learned by the Squire class for 300 JP . It increases the user ' s Attack power by 1 for the duration of the battle , and has a 100 % hit rate . It has no charge time , but can only target the user . " Final Fantasy Tactics Advance " . Boost is an ability learned by Archers with the Longbow . It increases the power of the next physical attack , whether it be an action or a Counterattack . Focus is once again an ability learned by Archers with the Longbow for 100 AP . It works the same as it did in " Final Fantasy Tactics Advance " . " Final Fantasy Tactics S " . The Boost command is equipped to every playable character by default , and lets the user conserve their Action Points without taking a turn . They take less damage from enemy attacks on their Boost turn , making the Boost command comparable to the Defend command in other " Final Fantasy " titles . " Final Fantasy Dimensions " . Focus is the level 3 ability of the Monk class , learned for 40 AP . It can be used up to 3 times to increase the power of the next used ability , and requires one ability slot to equip . Glaive begins the game with this ability . " Theatrhythm Final Fantasy " . Focus comes in three levels of power and is a Reactive ability that activates during Battle Music Sequence s each time the player receives a " Good " or better on 13 Hold Triggers . Focus deals physical damage based on the level of the skill . Firion , Kain , Cloud , Squall and Prishe can learn all three levels of Focus , while Warrior of Light learns Focus Lv1 and Focus Lv3 and Sephiroth learns Focus Lv1 .