Blood Sword (weapon)

The Blood Sword, also known as the Drainer or simply Drain, is a recurring weapon in the Final Fantasy series. It usually inflicts minor damage, but all damage inflicted will be absorbed by the wielder of the sword.

Final Fantasy II
Two Blood Swords can be obtained. They inflict damage based on the maximum hit points of a foe, and thus are very effective against bosses, especially the Emperor. In the Advance release, there is only one.

Final Fantasy III
A regular sword, it has average attack power.

Final Fantasy IV
The Drain Sword can only be equipped by Paladin Cecil and Kain.

Final Fantasy V
The Blood Sword is a sword, called the Drain Sword in the RPGe translation.

Final Fantasy VI
The Drainer can only be equipped by Terra, Locke, Edgar and Celes.

Final Fantasy IX
A Knightsword that can be equipped by Steiner. It teaches him Darkside.

Final Fantasy XI
Called the Bloody Sword, it is one of a number of high level weapons that have an HP draining characteristic including the Bloody Rapier, Bloody Blade, and the High Quality counterparts the Carnage Sword, Carnage Rapier, and Carnage Blade. The Bloody Sword is a two handed weapon, the bloody rapier is obviously a rapier, and the bloody blade is one handed scimitar.

Final Fantasy XII
The Blood Sword behaves differently, inflicting the status effect Sap on the target. It is one of the few weapons that has its own License.

Final Fantasy Tactics
A regular sword, it can only be obtained by poaching a Hydra. One can also be stolen from Gaffgarion at the Golgollada Gallows in Chapter II.

Final Fantasy Tactics Advance
A regular sword and, although it is quite weak, it absorbs the HP of foes. It is usually found later in the game and cannot be bought from stores.