Drainheart Sword

The Drainheart Sword is a unique Ancient Nord Sword found in.

Acquisition
The Drainheart Sword is one of four unique ghost weapons wielded by spectral variants of Draugr. These can be encountered only in Labyrinthian during The Staff of Magnus quest.

The other three weapons are the Drainblood Battleaxe, Drainspell Bow and Ghostblade.

Enchantment
It absorbs 15 points of stamina with each hit. As with all ghost weapons, it cannot be improved at a grindstone, though it has unlimited charges and can be disenchanted to gain the Absorb Stamina enchantment.

Bugs
At an Arcane Enchanter, you will be able to "disenchant" this sword even if you already have the "Absorb Stamina" enchantment unlocked, thus giving you two "Absorb Stamina" enchantments in your list of available enchantments.