Vengeance was a particularly baleful weapon created some hundred years ago by a Blood sorcerer whose village was put to the sword by a noble, of a line now extinct for relatively obvious reasons. The sword is said to have been steeped in blood at every stage of its creation, finally fixed when it was driven into the heart of the youngest daughter of the noble in question. It is said that this sword killed all but one of the offending line of nobility, and that the last in that line took up the sword to seek revenge for the death of his family. So the cycle began and so it continues. Anybody who takes up the sword becomes a potent instrument for vengeance, implacable, indefatigable and near unstoppable. However, as an eye for an eye leaves the world blind, those who bear the sword inevitably fall to it.
Those who wield Vengeance become Indefatigable. They are only affected by hits to the torso.