Final Fantasy VII/Command Materia

The Yellow Materia equips new commands to use during battle. Some types of yellow materia will gain new abilities as they mature.

There are thirteen different Command Materias in the video game.

Support
Materias that do not affect enemies directly.
 * Mime: Duplicates the last battle action performed by a party member without consuming MP or items. Limit Breaks cannot be mimed by characters other than the one who owns the limit, but every other battle action including counter attacks and defend can.
 * W-Item: Allows user to utilize two items from inventory at once. (See also: Item duplication cheat)
 * W-Magic: Allows user to cast two magic spells at once.
 * W-Summon: Allows user to cast two summon spells at once.

Debuff
Materias that target enemies but deal negligible or no damage.
 * Manipulate: Allows user to take control of an opponent and use up to three of their battle commands. While manipulated, a target's dexterity falls to negligible levels. Control will be broken as soon as the target takes physical damage. This is the only way to learn several Enemy Skills, though it does not work on all enemies.
 * Morph: Causes physical damage with reduced attack power on equipped weapon below 500 points. If the attack kills the enemy, the enemy becomes an item.
 * Sense: Allows user to see the stats (lvl., HP, MP, etc.) of a target. Not all enemies can be scanned.
 * Steal: Has the following abilities:
 * 1) Steal: Attempt to steal an item from a single target.
 * Mug: Takes the place of Steal of the command list when matured. Causes physical damage to a single target when attempting to steal an item.

Attack
Materias that deal damage to enemies.
 * Deathblow: Either kills enemy (dealing double damage) or misses. Effective on weakened enemies only.
 * Double Cut: Has the following abilities:
 * 1) 2x Cut: Attacks one target twice in a single round.
 * 2) 4x Cut: Takes the place of 2x Cut on command list when matured. Attacks four enemies in succession.
 * Slash-All: Has the following abilities:
 * 1) Slash-All: Attacks all enemies simultaneously. Attack is reduced to approximately 2/3 of normal and back row defenses still apply.
 * 2) Flash: Replaces Slash All on command list when matured. When successful, causes Death to all enemies.
 * Throw: Has the following abilities:
 * 1) Throw: Throws an item from inventory at a single target for damage.
 * 2) Coin: Throws coins at a single target for damage. 1,000gil = 100HP of damage.
 * Enemy Skill: Learns the following enemy abilities and allows the player to use those abilities once they have been used against him/her:
 * L5 Death: Causes Death to a single target on one side of the battle screen if its experience level is divisible by five.
 * Laser: Halves the HP of a single target.
 * Magic Breath: Causes lightning-, ice-, and fire-elemental damage to all targets on one side of the battle screen.
 * Magic Hammer: Causes damage to and absorbs up to 100MP from a single target.
 * Matra Magic: Shoots magical missiles toward all targets on one side of the battle screen.
 * Pandora’s Box: Causes physical damage to all targets on one side of the battle screen.
 * ????: Causes physical damage to a single target based on the Max HP - Current HP of the user.
 * Roulette: Randomly causes Death to a random target on either side of the battle screen.
 * Shadow Flare: Causes non-elemental magic damage to all targets on one side of the battle screen.
 * Trine: Causes lightning-elemental damage to all targets on one side of the battle screen.
 * White Wind: Restores all targets on one side of the battle screen with HP based of user’s current HP, and heals all status effects.
 * Angel Whisper: Revives a knocked out target with full HP and no status ailments.
 * Aqualung: Causes water-elemental damage to all targets on one side of the battle screen.
 * Bad Breath: Causes random status effects to all targets on one side of the battle screen.
 * Beta: Causes fire-elemental damage to all targets on one side of the battle screen.
 * Big Guard: Casts Barrier, Mbarrier, and Haste on all targets on one side of the battle screen.
 * Chocobuckle: Attacks target with damage proportionate to the number of times the user's party has fled from battle.
 * Death Force: Makes target immune from instant Death.
 * Death Sentence: Gives target a sixty second countdown to instant Death.
 * Dragon Force: Increases Vitality and Magic def. stats of a single target.
 * Frog Song: Gives Toad and Sleep status effects to a single target.
 * Goblin Punch: Causes physical damage to single target. Damage multiplies if target and user are of equal experience level.
 * L4 Suicide: Lowers the HP of, and gives the Mini status effect to, all targets on one side of the battle screen with an experience level divisible by four.

Materia location
It may be useful to know how early any materia can be obtained.

 Disc 1, part 1 (Midgar):
 * Steal (sewers)
 * Sense (on Nanaki)
 * Enemy Skill (n.1, Shinra H.Q.)

 Disc 1, part 2 (land travels):
 * Enemy Skill (n.2, Junon)
 * Throw (on Yuffie)
 * Manipulate (on Caith Sith)
 * Deathblow (Gongaga)

 Disc 1, part 3 (sea travels):
 * Enemy Skill (n.3, Forgotten Capital)
 * Morph (Temple of the Ancients)
 * Mime (Wutai cave)

 Disc 2:
 * Enemy Skill (n.4, Chocobo Sage's)
 * Double Cut (Sunken Gelnika)
 * Slash-All (Ancient Forest)
 * W-Summon (Gold Saucer)
 * W-Item (Midgar)

 Disc 3:
 * W-Magic (Northern Cave)

Master Command
The Master Command materia combines the Deathblow, Manipulate, Mime, Morph, Sense, Steal, and Throw Command Materias, allowing the user to equip all seven command abilities with a single Materia. It can be obtained by mastering all seven Command Materia and then combining them with the yellow Huge Materia. A second Master Command Materia can be obtained by defeating Emerald Weapon.