The buckle of this wide leather belt is set with a single blood-red carbuncle.

Activating a belt of one mighty blow grants extra damage on your next melee attack made before the end of your turn. A light weapon deals an extra 1d8 points of damage, a one-handed weapon deals an extra 2d6 points of damage, and a two-handed weapon deals an extra 3d6 points of damage.
A belt of one mighty blow functions once per day.

Prerequisites: Craft Wondrous Item, bull’s strength.
Cost to Create: 500 gp (plus 500 gp for base item), 40 XP, 1 day.