Rune Blade

The Rune Edge, also translated as Rune Sword or Rune Blade, is a recurring weapon in the Final Fantasy series. It often is related to the user's magical abilities.

Final Fantasy
The Rune Sword was found in the Temple of Chaos and did extra damage to enemy magic users.

Final Fantasy V
The Rune Edge consumed the user's MP upon attacking for an automatic critical hit. It can be stolen from Stingrays.

Final Fantasy VI
The Rune Edge consumed the user's MP upon attacking for an automatic critical hit. It can be found in the Narshe mines, and bought later in the World of Ruin, although by this time it is largely useless.

Final Fantasy VII
The Rune Blade can be found on Mt. Nibel, and can be bought in Junon late in the game. It has four unlinked Materia slots and gives Double Materia growth.

Final Fantasy IX
The Rune Blade teaches the Iai Strike ability.

Final Fantasy Tactics
The Rune Blade powers up the user's strength and magic abilities and can be bought for 20,000 gil.