Sleep Sword

Sleep Sword, also called Slumber, Sleep Blade, Half Moon, and Slumber Blade, is a recurring weapon in the series. It is usually a mid-ranked sword that inflicts the Sleep status when attacking with it.

Final Fantasy II
The Crescent Sword is a low-ranked sword that inflicts Sleep when attacking with it. It provides 30 Attack, 10% Accuracy, and 1% Evasion, and is found on the second floor of the Dreadnought.

Final Fantasy IV
Sleep Blade, originally called Slumber, is a mid-ranked sword that can be used by both Paladin Cecil and Kain. It is found in Eblan Castle, and has an Attack of 55, Accuracy of 27, and inflicts Sleep when attacking with it. It may also cast Sleep when used as an item.

Final Fantasy IV: The After Years
The Sleep Blade returns as a mid-powered sword, and retains all of its statistics from Final Fantasy IV. It can be found in Mist Cliff as Ceodore, or won from Sahagin Knight.

Final Fantasy V
Half Moon is a mid-ranked sword that can be used by all classes that can use swords. It can be bought in Castle of Bal, Regole, and Quelb, has an Attack of 46, and inflicts Sleep when attacking with it.

Final Fantasy Tactics
Sleep Blade is a mid-ranked sword that can be bought during Chapter 2 for 5,000 gil or by poaching Squidraken. It has 9 Attack, 5% Weapon Defense, and inflicts Sleep when attacking with it.