Belt of one mighty blow

This wide leather belt has a single large bloodstone set in the buckle.

Once per day, the wearer of the belt may, as a swift action, speak the command word to activate the belt’s power, which grants extra damage on the wearer’s next melee attack made before the end of his next turn. This is 1d8 points of damage if the attack is made with a light weapon, 2d6 points of damage with a one-handed weapon, and 3d6 points of damage with a two-handed weapon. This damage is added to the weapon’s normal attack damage, and is not multiplied on a critical hit.