Shadowstrike [Property]

This weapon is made of a dull black material, and its edges seem indistinct.

A shadowstrike weapon can reach through your own shadow to catch foes off guard. Once per day, you can activate the property to add 5 feet to the weapon’s reach for a single attack. The target is denied its Dexterity bonus to AC for this attack.

Prerequisites: Craft Magic Arms and Armor, shadow conjuration.

Cost to Create: 2,500 gp, 200 XP, 5 days.

Source: Magic Item Compendium, page 43.