Nightingale Blade

The Nightingale Blade is a one-handed sword in Elder Scrolls Skyrim. It is given to the Dragonborn as a reward by Karliah after completing the Thieves Guild quest, Hard Answers.

This blade is said to have once belonged to the former Nightingale and Thieves Guild leader Gallus Desidenius.

Stats
The enchantment for the blade is always "Absorb x points of health" and "Absorb x points of stamina."

The base weapon damage and both aspects of the enchantment scale depending on the Dragonborn's level upon recieving the item.

At level 46+, the blade will have 55 uses while doing 25 points of Absorb Health and Stamina. The number of charges depends on your destruction skill, and if you have a 100% destruction reduction set, many enchanted weapons will stay enchanted indefinitely.

Smithing
This item can be improved with the Arcane Blacksmith perk. It requires one Ebony Ingot. However, it is not affected by the Ebony Smithing or the Daedric Smithing perk.

''The highest level version of the Nightingale Blade is bugged and does not show up in the improvement menu after interacting with a Grindstone. All other versions do show up and can be improved.''

* Completed quest at level 55, and was able to improve Nightingale Blade with no problem.

Bugs
(Do this after completing all the Nightingale quests upto returning the Thieves Guild to its former glory.) It is possible to duplicate the blade by returning to Markarth Museum. If you're lucky, the quest to obtain Calcemo's research will pop up and youll be able to complete the quest, you will be rewarded with another nightingale blade.

Related
List of Leveled Items

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