Soultaker Sword

The Soultaker is a samurai sword capable of extracting the souls from those that it kills. The wielder can then communicate with the imprisoned spirit.

DCnU
The Soultaker is also the totem weapon of the Sword Clan, one of the clans of the Outsiders, making Katana their leader and granting her with immortality and true enlightenment so long as she has it.

Beware the Batman

 * See: Soultaker Sword (Beware the Batman)