You answered a riddle once. You knew it whispered something to you. Sometimes you can unwrap this ever-bleeding wound, and take some of it's power.
Somewhere between scar and open wound, when you take this on operations you unravel the bandages, and let it weep. You gain effect against Knock Adepts and spirits. Furthermore, when any mystic trap might physically injure you, you may declare that it passes through the wound. Once this is done the wound only grants effect. [Rather than Load, An Unhealing Wound imposes a permanent lesser harm for the Operation]