This whitewashed circular shield has a flat, perfectly smooth face interrupted only by a small blue rectangular crystal set into its exact center.

Once per day, you can raise this +1 heavy steel shield skyward and command a horizontal wall of force into existence. The wall of force has a 20-foot radius and hovers 5 feet above you, remaining above you as you move. It blocks all attacks from above, including catapult missiles and indirect fire (PH2 161). The wall of force lasts as long as you concentrate, up to a maximum of 10 rounds. Because you must keep your shield arm raised while the wall of force is active, you gain no benefit to AC from this shield for the duration of the effect.

Prerequisites: Craft Magic Arms and Armor, wall of force.
Cost to Create: 12,000 gp (plus 170 gp for base item), 960 XP, 24 days.