Projectile Screen

When you cast this spell you must declare the facing of the screen relative to you as forward, left, right, or behind. You create a curved screen of force in a 90 degree arc around your space centered on the facing you declared. This disk deflects non-magical arrows, bolts, and other ordinary projectiles launched from the other side of the screen, causing them to automatically miss anything behind the arc of protection (including you). However, boulders hurled by giants or siege engines and similar large projectiles, and attacks that are able to go over or around the arc of protection, are unaffected. A disintegrate spell or similar effect destroys the screen instantly.

At Higher Levels: The arc of protection is 180 degrees at 5th level, and 270 degrees at 11th level. At 17th level you no longer declare a facing, and the screen provides you with 360 degree orb of protection.