Black-Bladed Sword

Black-bladed Sword is the tentative name of this weapon in possession by Ainz.

Description
Dwarves noted that this weapon Ainz pulled out of his inventory is made of extraordinary quality.

Appearance
As the name implied, this sword described as black in color. Dwarves thought that the unbelievably fine edge of the weapon is practically teeming with magical radiance. There were twenty purple runes carved upon the blade.

Abilities
There is no description of it's actual power of any abilities it has but the Dwarven craftsman did not it has excellent craftsmanship and could feel it is embedded with powerful magic.