Rune equipment

Rune Equipment (ルーン Rūn) is a recurring type of equipment in the series. In most games that it appears in, it is usually one of the stronger types of equipment, though some Rune equipment can be found mid-game. Rune equipment is related to magic, often either deals with using MP for automatic critical hits or dealing extra damage to Mage-type enemies. The most common recurring type of Rune equipment are the Rune Blade, Rune Axe, and Rune Staff.

Final Fantasy
The Rune Blade was originally the only Rune equipment in the game, until the Dawn of Souls remake where the Rune Staff and Rune Axe appear as well. The Rune Axe is capable of casting Curaga when used as an item, while the Rune Staff could cast Healara when used as an item. The Rune Blade simply did extra damage to Mages.

Final Fantasy II
The unique piece of Rune equipment in Final Fantasy II is the Rune Axe deals extra damage against Mages and also casts Fog when used as an item, and is also the strongest axe in the game if you exclude Guy's ultimate weapon, the Gigantaxe.

Final Fantasy III
The Rune Staff is a high level staff that can cast Erase. The Rune Bow is a mid-level bow while the Rune Axe is a mid-level axe that both provides +2 Intelligence and Mind. The Rune Bell is the second strongest Bell in the game. The Rune Bracers are the first armor type of the Rune Equipment, and is a mid-level armor that provides some resistance to status attacks.

Final Fantasy IV
The Rune Axe is the second strongest axe in the game, and deals critical damage against mages. The Rune Staff also deals critical damage against mages, and can also inflict Silence when used as an item. Rune Armlet provides resistance to Silence, as well as being a mid-level armor.

Final Fantasy IV: The After Years
The Rune Axe, Rune Staff, and Rune Armlet return from Final Fantasy IV with the same stats.

Final Fantasy V
The Rune Axe is an axe which inflicts critical damage in exchange for MP, and is one of the Sealed Weapons. The Rune Chime, known simply as Rune in the RPGe translation, is a Bell which also consumes MP for a critical hit, and is the second strongest weapon of its type in the game. The Rune Edge is a mid-level sword that also consumes MP for a critical hit, though it is not found till late in the game.

Final Fantasy VI
The Rune Blade consumes 10 MP each attack for a critical hit, and can only be used by Terra, Edgar, and Celes.

Final Fantasy VII
The Rune Blade and Rune Armlet represent Rune Equipment in this game. Both pieces of Rune equipment have four non-linked slots and Double Materia growth abilities.

Crisis Core -Final Fantasy VII-
Rune Armlet is an accessory that boost Max MP by 80% and prevents Silence.

Final Fantasy VIII
Though it cannot be equipped, the Rune Armlet appears in the game as an item that can teach the ability "Spr +20%" to any GF.

Final Fantasy IX
The Rune Tooth is a mid-level weapon for Zidane that teaches him the ability "Lucky Seven", and has innate Poison. The Rune Blade is a high-level sword that only Steiner can equip that teaches him the ability Iai Strike, and has innate Darkness. The Rune Claws are Amarant's strongest weapons that teaches him Spare Change, Demi Shock, and Revive, and also have innate Darkness.

Final Fantasy X
Several weapons can get the "Rune" moniker by having the ability "Magic +5%" as the dominant ability. Tidus can also get the weapon Runemaster by having all 4 "Magic +%" abilities on a weapon.

Final Fantasy X-2
The Rune Bracer is an accessory that double the wearer's max MP.

Final Fantasy XI
Final Fantasy XI has a set of high-level Rune Weapons. These weapons each have different effects which activate when the weapon is drawn and consume MP over time. In addition to the special effects the Rune Weapons can mostly be equipped by Black Mages and Summoners regardless of the weapon class.

Final Fantasy XII
The Runeblade represents the Rune equipment.

Final Fantasy XII: Revenant Wings
The Runeblade appears again as a mid-level weapon for Vaan. The Rune Bracelet is an accessory for Penelo that increases the effectiveness of Dance abilities.

Final Fantasy XIII
Rune Bracelet is the only occurrence of Rune Equipment in the game. It grants +10 to 20% resistance to Magic, depending on its level, and can be upgraded to the Witch's Bracelet by using the Uranitie item. The Rune Bracelet can also be bought from B & W Outfitters in the Retail Network for 4,500 Gil.

Final Fantasy Tactics
The Runeblade is a high-level sword, and is the only Rune Equipment in the game.

Final Fantasy Crystal Chronicles
The Rune Hammer is a mid-level weapon with an Attack power of 25 possessing the Focus attack Shock Bomb. The Rune Shield is a high-rank shield that provides +18 Defense and Spell Range +20. Both the Rune Bell and Rune Staff are Magic-raising artifacts, raising Magic by 3 and 1 respectively.

Final Fantasy Crystal Chronicles: Ring of Fates
The Rune Saber, Rune Rod, and Rune Spoon all represent Rune Equipment.

Final Fantasy Crystal Chronicles: Echoes of Time
Rune Ax, Rune Bell, Rune Spear, and Rune Spear make up the Rune Equipment in this game.