Excalibur

Excalibur is a powerful sword which appears in several Final Fantasy games. The Excalibur makes its debut appearance in the first Final Fantasy game. In several of the weapon's appearances, there is only one Excalibur, and it is only obtainable through a quest.

There is a very weak imitation of the weapon called Excalipoor. A recurring gag in the games has Gilgamesh searching for the Excalibur, only to have the misfortune of ending up with Excalipoor instead.

Final Fantasy
In Final Fantasy, the Excalibur (known as Xcalber in the Nintendo Entertainment System version) is among the strongest swords, and it can only be equipped by the Knight. To obtain it, the Warriors of Light must obtain the Adamantite and give it to Smyth, who then crafts the material into the Excalibur.

The Excalibur is associated with eight elements: Death, Fire, Ice, Lightning, Paralysis, Quake, Stone, and Time. This allows it to deal extra damage to any type of enemy. The Excalibur increases the Knight's Attack by 45 and his Accuracy by 35. The weapon can be sold for a very high price of 30,000 gil.

In remakes starting with Final Fantasy I & II: Dawn of Souls, Gilgamesh appears in the Seahold area of Lifespring Grotto in search of Excalibur. The weapon turned out to be Excalipoor, leaving him disadvantaged in the battle against the Warriors of Light.