Reckoning Rod

Dark iron rod with a flat square head and small notched teeth filed along one edge, like a tally stick made too heavy to carry comfortably.

Only wizards and clerics may command it. Each charge calls one creature within 30 feet to answer for a single named act. If it did the thing named it takes 6d6 damage and stands motionless for one round; if it did not, nothing happens and the charge is spent anyway. Nothing else may toughen a bearer who carries it. When depleted the rod becomes too heavy to lift for anyone who has broken an oath they swore aloud.