By means of an anti-magic shell, the magic-user causes an invisible barrier to surround his or her person, and this moves with the spell caster. This barrier is totally impervious to all magic and magic spell effects (this includes such attack forms as breath weapons, gaze weapons, and voice weapons). It thus prevents the entrance of spells or their effects, and it likewise prevents the function of any magical items or spells within its confines. It prevents the entrance of charmed, summoned, and conjured creatures. However, normal creatures (assume a normal troll rather than one conjured up, for instance) can pass through the shell, as can normal missiles. While a magic sword would not function magically within the shell, it would still be a sword.