Umbral Needle

This obsidian dagger was forged by unknown creators using unknown, but almost certainly wicked, means. A sense of bloodlust and a primal need for violence all but radiates off of this cruel weapon, and a faint feeling like the beating of a heart can be felt while holding it. Blood that coats this blade does not stay warm for very long. Within seconds, all of the essence and warmth is drained from the blood into the dagger and siphoned directly into its wielder, healing wounds and allowing them to stay in the fight for much longer than they otherwise would be able to. When enough blood has been spilled, the dagger's thirst can be sated, albeit only temporarily. It seems that no amount of violence will ever be able to satisfy the Umbral Needle for long.