Vampire Blade

Vampire Blade is a magic dagger.

Description
Tia and Tina use a pair of these daggers to subdue the guards around a black dust plantation operated by Eight Fingers.

Appearance
In the Anime, this weapon bears a close resemblance to a silver dagger. However, once its ability is activated, it glows crimson red, with blood like veins all across the blade.

Abilities
Vampire Blade is a unique assassination weapon that absorbs the blood of the victim, and in the process leaves it dry, making it a useful tool to hide obvious traces of a murder.

Trivia

 * The Vampire Blades are strapped on the upper backs of the users.