Shield

When this spell is cast, an invisible barrier before she front of the magic-user comes into being. This shield will totally negate magic missile attacks. Is provides the equivalent protection of armor class 2 against hand hurled missiles (axes, darts, javelins, spears, etc.), armor class 3 against small device-propelled missiles (arrows, bolts, bullets, manticore spikes, sling stones, etc.), and armor class 4 against all other forms of attack. The shield also adds + 1 to the magic-user's saving throw dice vs. attacks which are basically frontal. Note that all benefits of the spell accrue only to attacks originating from the front facing the magic-user, where the shield can move to interpose itself properly.