Vampire's Edge

Vampire's Edge is a unique Chinese Officer's Sword that does significantly more damage than a normal sword. It belongs to Vance (Fallout 3), and is obtained during the Blood Ties quest, in Meresti Station. It is located in the familly cloister in a hard level locked sword cabinet, near a bed. You can either kill or pick pocket vance and get his key, but is not recommended, or just pick the lock and take it, you will get bad karma for stealing the sword, but its well worth it as it is a good weapon.

It can be repaired using ordinary Chinese Officer's Swords.

Bug If the sword is droped in the Megaton House, when you pick up, it appears you're stealing(360 confirmed). But not causes any Karma penalty